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This is ... and this is ... with science in the news of VOA Special English program about recent development in science. Today we tell you everything you?Tve ever wanted to know about snow. Winter weather is returning northern area ? warm. In much of the United States, winter means the return of snow. Snow is a subject of great interest to weather experts. Experts sometimes have difficulty estimating where, when or how much snow will fall. One reason is that heavy amounts of snow fall in suprisingly small area. Another reason is that a small change in temperature can mean the difference between snow and rain. Snow is a form of frozen water. It contains many groups of tiny ice-particle called snow-crystals. These crystals grow from water-particles in cold clouds. They usually grow around a piece of dusts. All snow-crystals have six sides what they grow in different shapes. The shape depends mainly on the temperature and water levels in the air. Snow-crystals grow in one of two designs, ? and columnar. ? crystals are flat. They form when the air temperature is about fifteen degrees below zero Celsious. Columnar snow-crystals look like ? They form when the air temperature is about five degrees below zero Celsious. The shape of a snow crystal may change from one form to another as the crystal ? through levels of air with different temperatures. When melting snow-crystals or .. for through very cold air they freeze to form small particles of ice called slit. Groups of frozen water droplets are called snow palace. Under some con***ions, these particles may grow larger and form ? of ice for ? When snow-crystals stick together they produce snow flecks. Snow flecks come in different sizes as many as one hundred crystals may join together to form a snow fleck larger than two and one half centimeters. Under some con***ions, snow flecks can form that are five centimeters long. Usually this requires near freezing temperature like winds and changing con***ions in earth atmosphere. Snow contains much less water than rain. About fifteen centimeters of wet snow has as much water as two and one half centimeters of rain. About seventy six centimeters of dry snow equal the water in two and one half centimeters of rain. Much of the water we use come from snow. Melting snow provides water for rivers, electric power centers and agricutural crops. In the Western United States, melting snow provides up to seventy five percent of all surface water supplies. Snow fall helps to protect plants and some wild animals from cold winter weather. Fresh snow is made largely of air trapped among crystals. Because the air has trouble moving, the movement of heat is greatly reduced. Snow also is known to influence the movement of sound waves. When there is fresh snow on the ground the surface of the snow takes in or absorbs sound waves. However, snow can become hard and fleck as it becomes older or if they have been strong wills. Then the snow surface will help to send back sound waves. Under these con***ions, sound may seem clearer and travel farther. Generally, the colour of snow and ice appears white. This is because the light we see from the sun is white. Most of natural materials take in some sunlight. They keep them their colours. However, when light travels from air to snow sunlight is sent back or reflected. Snow-crystals have many surfaces to reflect sunlight. Yet this snow does take in little sunlight.

Mọi người sửa cho tớ nhé.
This is ... and this is ... with science in the news of VOA Special English program about recent development in science. Today we?Tll tell you everything you?Tve ever wanted to know about snow. Winter weather is returning northern area ? warm. In much of the United States, winter means the return of snow. Snow is a subject of great interest to weather experts. Experts sometimes have difficulty estimating where, when or how much snow will fall. One reason is that heavy amounts of snow fall in suprisingly small area. Another reason is that a small change in temperature can mean the difference between snow and rain. Snow is a form of frozen water. It contains many groups of tiny ice-particles called snow-crystals. These crystals grow from water-particles in cold clouds. They usually grow around a piece of dusts. All snow-crystals have six sides what they grow in different shapes. The shape depends mainly on the temperature and water levels in the air. Snow-crystals grow in one of two designs, flat-like and columnar. Flat-like crystals are flat. They form when the air temperature is about fifteen degrees below zero Celsious. Columnar snow-crystals look like ? They form when the air temperature is about five degrees below zero Celsious. The shape of a snow crystal may change from one form to another as the crystal passes through levels of air with different temperatures. When melting snow-crystals or .. for through very cold air they freeze to form small particles of ice called slit. Groups of frozen water droplets are called snow palace. Under some con***ions, these particles may grow larger and form ? of ice for ? When snow-crystals stick together they produce snow flecks. Snow flecks come in different sizes as many as one hundred crystals may join together to form a snow fleck larger than two and one half centimeters. Under some con***ions, snow flecks can form that are five centimeters long. Usually this requires near freezing temperature like winds and changing con***ions in earth atmosphere. Snow contains much less water than rain. About fifteen centimeters of wet snow has as much water as two and one half centimeters of rain. About seventy six centimeters of dry snow equal the water in two and one half centimeters of rain. Much of the water we use come from snow. Melting snow provides water for rivers, electric power centers and agricutural crops. In the Western United States, melting snow provides up to seventy five percent of all surface water supplies. Snow fall helps to protect plants and some wild animals from cold winter weather. Fresh snow is made largely of air trapped among crystals. Because the air has trouble moving, the movement of heat is greatly reduced. Snow also is known to influence the movement of sound waves. When there is fresh snow on the ground the surface of the snow takes in or absorbs sound waves. However, snow can become hard and flat as it becomes older or if they have been strong winds. Then the snow surface will help to send back sound waves. Under these con***ions, sound may seem clearer and travel farther. Generally, the colour of snow and ice appears white. This is because the light we see from the sun is white. Most of natural materials take in some sunlight. This keeps them their colours. However, when light travels from air to snow sunlight is sent back or reflected. Snow-crystals have many surfaces to reflect sunlight. Yet this snow does take in our little sunlight. It is this flight that give snow white in appearance. Sometimes, snow or ice may appeare to be blue. The blue light is the product of a long travel path through the snow or ice. In simple terms, think of snow or ice as a filter. A filter is designed to reject some substances while permitting others to pass through. In the case of snow, all the light makes it through if the snow is only a centimeter thick. If it is a meter or more thick, however, blue light often can be seen. Snow falls in extreme northern and certain areas of the world throughout the year. However, the heaviest snow falls have been reported in mountains of other areas during winter. These areas include the ? in Italia and Switzeland, the coastal moutains of Western Canada, and ?, and rocky mountains in the United States. In warmer climates, snow is known to fall in areas over four thousand nine hundred meters above sea level. Each year, the continental United States has an average of one hundred of snow storms. An average storm produces snow for two to five days. Almost every part of the country has received snow fall at one time or another. Even parts of certain further have reported affuse no flecks. The national records for snow fall in a single season was set in nineteen ninety eight and nineteen ninety nine. Two thousands eight hundred ninety five centimeters of snow fell at the Mt Baker ski area in the north-western state of Washington. People in many other areas have little or no snow fall. In nineteen thirty six, a physicist from Japan produced the first man-made snow in a laboratory. During the nineteen fourties, several American scientists developed methods for making snow in other areas. Clouds with extremely cool water are mixed with man-made ice-crystals such as ? AHA and ? crystal. Sometimes, dry ice particles or liquid propane are used. Today, special machines are used to produce limited amounts of snow for winter holiday ski area. Snow is responsible for the death of hundreds of people in the United States every year. Many people died in traffic accidents on roads that are covered with snow or ice. Others died from being out in the cold or from heart attacks caused by extreme physical activities. A few years ago, a major storm caused serious problems in the eastern United States. It struck the southeast in January nineteen ninety six before moving of the east coast. The storm was claimed for more than one hundred deaths. It forced nine states to declare emergency majors. ? and west Virginia was hit hardest. In some areas there, snow fall amounts were more than one meter high. Several states limited driving to emergency vihicles, most major airports for close for at least a day or two. A week later, two other storms brought ad***ional snow to the east coast. In the New York city area, the heavy weight of snow forced the top of some buildings to break down. Many travellers were forced to walk long distances through dig snow to get to train stations. People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of winter snow storms. People should stay in there homes until the storm has passed. While removing large amounts of snow they should stop and rest often. Difficult physical activities during snow removal can cause a heart attack. It is always a good idea to keep a lot of necessary supplies in the home even before the winter begins. These supplies include foods, medicine, clean water and extra power supplies. Some drivers have become trapped in their vehicles during a snow storm. If it happens, people should remain in or near their cars unless they see some kind of help. People should get out and clear space around the vehicle to prevent the possibility of carbin ? gas poisoning. People should tie a bright object to the top of their car to increase the trend of rescue. Inside of the car, they should open a window a little for fresh air and turn on the engine for ten or fifteen minutes every hour for heat. People living in areas where winter storms are likely should carry emergency supplies in their vehicle. These include foods, emergency medical supplies, and extra clothing to stay warm and dry. People in these ares should always be prepared for winter emegencies. Snow can be beautiful to look at but it can also be dangerous.

This is Steve Ember and this is Bob Doughty with Science in the News of VOA Special English program about recent developments inside. Today we tell you everything you ever wanted to know about snow.
Winter weather is returning to Northern areas of the world. In much of the United State, winter means the return of snow. Snow is the subject of great interest to weather experts. Experts sometimes have difficulty estimating where, when or how much snow will fall. One reason is that heavy amounts of snow fall in surprisingly small areas. Another reason is that a small change in temperature can mean the difference between snow and rain.
Snow is a form of frozen water. It contains many groups of tiny ice particles called snow crystals. These crystals grow from water particles in cold clouds. They usually grow around a piece of dust. All snow crystals have 6 sizes, but they grow in different shapes. The shape depends mainly on the temperature and water levels in the air. Snow crystals grow in one of 2 designs: plate-like and columnar. Plate-like crystals are flat. They form when the air temperature is about 15 degrees below 0 Celsius. Columnar snow crystals look like sticks of ice. They form when the temperature is about 5 degrees below 0 Celsius.
The shape of a snow crystal may change from 1 form to another as the crystal passes through levels of air with different temperatures. When melting snow crystals or raindrops fall through very cold air, they freeze to form small particles of ice, called sleet. Groups of frozen water droplets are called snow pallets. Under some con***ions, these particles make snow larger and form solid piece of ice or hail.
When snow crystals stick together they produce snowflakes. Snowflakes come in different sizes. As many as 100 crystals may join together to form a snowflake larger than 2 and 1/2 centimeters. Under some con***ions, snowflakes can form that are 5 centimeters long. Usually this requires near freezing temperature, light winds and changing con***ions in earth?Ts atmosphere. Snow contains much less water than rain. About 15 centimeters of wet snow has as much water as 2 and 1/2 centimeters of rain. About 76 centimeters of dry snow equals to water in 2 and 1/2 centimeters of rain.
Much of the water we use comes from snow. Melting snow provides water for rivers, electric power centers and agricultural crops. In the Western of US, mountains snow provides up to 75% of all surface water supplies. Snowfall helps to protect plants and some wild animals from cold winter weather. Fresh snow is made largely of air trapped among snow crystals. Because the air has trouble moving, the movement of heat is greatly reduced. Snow also is known to influence the movement of sound waves. When there is fresh snow on the ground, the surface of snow takes in or absorbed sound waves. However snow can become hard and flat as become older or there have been strong winds. Then the snow?Ts surface will help to send back sound waves. Under these con***ions, sound may seem clearer and travel farther.
Generally the color of snow and ice appears white. This is because the light we see from the sun is white. Most naturally materials take in some sunlight, this keeps them their color. However when light travel from air to snow, sunlight is sent back or reflected. Snow crystals have many surfaces to reflect sunlight. Yet the snow does take in a little sunlight. It is this light that gives snow its white appearance. Sometimes snow or ice may appear to be blue. The blue light is the product of a long travel path through the snow or ice. In simple terms, think of snow or ice as a filter. A filter is designed to reject some substances while permitting others to pass through. In the case of snow, all the light makes it through if the snow is only a centimeter thick. If it is a meter or more thick (???), however, blue light often can be seen.
Snow falls in extreme Northern and Southern areas of the world through out the year. However the heaviest snowfalls have been reported in the mountains of other areas during winter. These areas include the Alps in Italy and Switzerland, the Coastal Mountains of Western Canada and the ??? Nevada (???) and Rocky Mountains in the United State. In warmer climates, snow is known to fall in areas over 4900 meters above sea level.
Each year the continental of United State has an average of 100 snow storms. An average storm produces snow for 2 to 5 days. Almost every part of the country has received snowfall at 1 time or 1 another. Even parts of Southern Florida have reported a few snowflakes. The national record for snowfall in a single season was set in 1998 and 1999: 2895 centimeters of snow fell at the Mount Vicar Ski Area in the northwestern state of Washington.
People in many other areas have little or no snowfall. In 1936, a physicist from Japan produced the 1st man-made snow in a laboratory. During the 1940s, several American scientists developed methods for making snow in other areas. Clouds with extremely cool water are mixed with man-made ice crystals such as silver iodide and metal-dehyde (???) crystals. Sometimes dry ice particles or liquid propane are used. Today special machines are used to produce limited amounts of snow for winter holiday ski areas.
Snow is responsible for the deaths of hundreds of people in the United State every year. Many people die in traffic accidents on roads that are covered with snow or ice. Others die from being out in the cold or from heart-attack caused by extreme physical activities. A few years ago, a major storm caused serious problems in the Eastern of United State. It struck the Southeast in January, 1996 before moving of the East Coast. The storm was blamed for more than 100 deaths. It forced 9 states to declare emergency measures. Virginia and West Virginia were hit hardest. In some areas there, snow fall amounts were more than 1 meter high. Several states limited driving to emergency vehicles. Most major airports were closed for at least a day or 2. A week later, 2 other storms brought ad***ional snow to the East Coast. In the New York City area, the added weight of snow forced the tops of some buildings to break down. Many travelers were forced to walk long distances through deep snow to get to train stations.
People may not be able to avoid living in areas where it snows often. However they can avoid becoming victims of winter snow storms. People should stay in their homes until the storm has passed. While removing large amounts of snow they should stop and rest often. Difficult physical activities during snow removal can cause the heart attacks. It is always a good idea to keep a lot of necessary supplies in the home even before winter begins. These supplies include food, medicine, clean water and extra power supplies.
Some drivers have become trapped in their vehicles during a snow storm. If this happens people should remain in or near their car unless they see some kind of help. They should get out and clear space around the vehicle to prevent the possibility of cabin monoxide gas poisoning. People should tie a bright colored object to the top of their car to increase the chance of rescue. Inside the car they should open a window a little for fresh air and turn on the engine for 10 or 15 minutes every hour for heat. People living in area where winter storm are likely should carry emergency supplies in their vehicle. These include food, emergency medical supplies and extra clothing to stay warm and dry. People in these areas should always be prepared for winter emergencies. Snow can be beautiful to look at, but it can also be dangerous.
This is Science in the News was written by George Grow and produced by Cynthia Kirk with audio Special English.
Được lovely_pig1987 sửa chữa / chuyển vào 12:52 ngày 23/06/2006

E*** bài của @sky_perfume
This is Steve Ember and this is Bob Doughty with science in the news of VOA Special English program about recent developments in science. Today we?Tll tell you everything you?Tve ever wanted to know about snow.
Winter weather is returning to northern areas ? warm of the world . In much of the United States, winter means the return of snow. Snow is a subject of great interest to weather experts. Experts sometimes have difficulty estimating where, when or how much snow will fall. One reason is that heavy amounts of snow fall in suprisingly small areas. Another reason is that a small change in temperature can mean the difference between snow and rain.
Snow is a form of frozen water. It contains many groups of tiny ice-particles called snow-crystals. These crystals grow from water-particles in cold clouds. They usually grow around a piece of dusts. All snow-crystals have six sides sizes what but they grow in different shapes. The shape depends mainly on the temperature and water levels in the air. Snow-crystals grow in one of two designs, flat-like plate-like and columnar. Plate-like crystals are flat. They form when the air temperature is about fifteen degrees below zero Celsious. Columnar snow-crystals look like sticks of ice. They form when the air temperature is about five degrees below zero Celsious.
The shape of a snow crystal may change from one form to another as the crystal passes through levels of air with different temperatures. When melting snow-crystals or raindrops for fall through very cold air, they freeze to form small particles of ice called slit sleet. Groups of frozen water droplets are called snow palace pallets. Under some con***ions, these particles may grow larger and form solid piece of ice for or hail.
When snow-crystals stick together they produce snow flecks flakes. Snowflakes come in different sizes as many as one hundred crystals may join together to form a snowflake larger than two and one half centimeters. Under some con***ions, snowflakes can form that are five centimeters long. Usually this requires near freezing temperatures, like light winds and changing con***ions in earth''''s atmosphere. Snow contains much less water than rain. About fifteen centimeters of wet snow has as much water as two and one half centimeters of rain. About seventy six centimeters of dry snow equals the to water in two and one half centimeters of rain.
Much of the water we use comes from snow. Melting snow provides water for rivers, electric power centers and agricutural crops. In the Western United States, melting snow provides up to seventy five percent of all surface water supplies. Snow fall Snowfall helps to protect plants and some wild animals from cold winter weather. Fresh snow is made largely of air trapped among snow crystals. Because the air has trouble moving, the movement of heat is greatly reduced. Snow also is known to influence the movement of sound waves. When there is fresh snow on the ground, the surface of the snow takes in or absorbs sound waves. However, snow can become hard and flat as it becomes older or if they there have been strong winds. Then the snow''s surface will help to send back sound waves. Under these con***ions, sound may seem clearer and travel farther.
Generally, the colour of snow and ice appears white. This is because the light we see from the sun is white. Most of natural materials take in some sunlight. This keeps them their colours. However, when light travels from air to snow sunlight is sent back or reflected. Snow-crystals have many surfaces to reflect sunlight. Yet this the snow does take in our a little sunlight. It is this flight light that gives snow its white in appearance. Sometimes, snow or ice may appeare to be blue. The blue light is the product of a long travel path through the snow or ice. In simple terms, think of snow or ice as a filter. A filter is designed to reject some substances while permitting others to pass through. In the case of snow, all the light makes it through if the snow is only a centimeter thick. If it is a meter or more thick, however, blue light often can be seen.
Snow falls in extreme northern and certain southern areas of the world throughout the year. However, the heaviest snow falls have been reported in mountains of other areas during winter. These areas include the ? in Italia and Switzeland, the coastal moutains of Western Canada, and ?, and rocky mountains in the United States. In warmer climates, snow is known to fall in areas over four thousand nine hundred meters above sea level.
Each year, the continental United States has an average of one hundred of snow storms. An average storm produces snow for two to five days. Almost every part of the country has received snow fall at one time or another. Even parts of certain further have reported affuse no flecks. The national records for snow fall in a single season was set in nineteen ninety eight and nineteen ninety nine. Two thousands eight hundred ninety five centimeters of snow fell at the Mt Baker ski area in the north-western state of Washington. People in many other areas have little or no snow fall. In nineteen thirty six, a physicist from Japan produced the first man-made snow in a laboratory. During the nineteen fourties, several American scientists developed methods for making snow in other areas. Clouds with extremely cool water are mixed with man-made ice-crystals such as ? AHA and ? crystal. Sometimes, dry ice particles or liquid propane are used. Today, special machines are used to produce limited amounts of snow for winter holiday ski area. Snow is responsible for the death of hundreds of people in the United States every year. Many people died in traffic accidents on roads that are covered with snow or ice. Others died from being out in the cold or from heart attacks caused by extreme physical activities. A few years ago, a major storm caused serious problems in the eastern United States. It struck the southeast in January nineteen ninety six before moving of the east coast. The storm was claimed for more than one hundred deaths. It forced nine states to declare emergency majors. ? and west Virginia was hit hardest. In some areas there, snow fall amounts were more than one meter high. Several states limited driving to emergency vihicles, most major airports for close for at least a day or two. A week later, two other storms brought ad***ional snow to the east coast. In the New York city area, the heavy weight of snow forced the top of some buildings to break down. Many travellers were forced to walk long distances through dig snow to get to train stations. People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of winter snow storms. People should stay in there homes until the storm has passed. While removing large amounts of snow they should stop and rest often. Difficult physical activities during snow removal can cause a heart attack. It is always a good idea to keep a lot of necessary supplies in the home even before the winter begins. These supplies include foods, medicine, clean water and extra power supplies. Some drivers have become trapped in their vehicles during a snow storm. If it happens, people should remain in or near their cars unless they see some kind of help. People should get out and clear space around the vehicle to prevent the possibility of carbin ? gas poisoning. People should tie a bright object to the top of their car to increase the trend of rescue. Inside of the car, they should open a window a little for fresh air and turn on the engine for ten or fifteen minutes every hour for heat. People living in areas where winter storms are likely should carry emergency supplies in their vehicle. These include foods, emergency medical supplies, and extra clothing to stay warm and dry. People in these ares should always be prepared for winter emegencies. Snow can be beautiful to look at but it can also be dangerous.
Được lovely_pig1987 sửa chữa / chuyển vào 12:46 ngày 23/06/2006

post bài mới đi mọi người!!!!!

e*** bài của lovely_pig1987
This is Steve Ember and this is Bob Doughty with Science in the News, a VOA Special English program about recent developments in science. Today we?Tll tell you everything you ever wanted to know about snow.
Winter weather has returned to northern areas of the world. In much of the United States, winter means the return of snow. Snow is a subject of great interest to weather experts. Experts sometimes have difficulty estimating where, when or how much snow will fall. One reason is that heavy amounts of snow fall in suprisingly small areas. Another reason is that a small change in temperature can mean the difference between snow and rain.
Snow is a form of frozen water. It contains many groups of tiny ice particles called snow crystals. These crystals grow from water particles in cold clouds. They usually grow around a piece of dust. All snow crystals have six sides, but they grow in different shapes. The shape depends mainly on the temperature and water levels in the air.
Snow crystals grow in one of two designs, plate-like and columnar. Plate-like crystals are flat. They form when the air temperature is about fifteen degrees below zero Celsius. Columnar snow crystals look like sticks of ice. They form when the air temperature is about five degrees below zero Celsius.
The shape of a snow crystal may change from one form to another as the crystal passes through levels of air with different temperatures. When melting snow crystals or raindrops fall through very cold air, they freeze to form small particles of ice called sleet.
Groups of frozen water droplets are called snow pellets. Under some con***ions, these particles may grow larger and form solid pieces of ice, or hail.
When snow crystals stick together, they produce snowflakes. Snowflakes come in different sizes. As many as one hundred crystals may join together to form a snowflake larger than two and one half centimeters. Under some con***ions, snowflakes can form that are five centimeters long. Usually, this requires near freezing temperatures, light winds and changing con***ions in earth''s atmosphere.
Snow contains much less water than rain. About fifteen centimeters of wet snow has as much water as two and one half centimeters of rain. About seventy six centimeters of dry snow equals to water in two and one half centimeters of rain.
Much of the water we use comes from snow. Melting snow provides water for rivers, electric power centers and agricutural crops. In the Western United States, mountain snow provides up to seventy five percent of all surface water supplies.
Snowfall helps to protect plants and some wild animals from cold winter weather. Fresh snow is made largely of air trapped among the snow crystals. Because the air has trouble moving, the movement of heat is greatly reduced.
Snow also is known to influence the movement of sound waves. When there is fresh snow on the ground, the surface of the snow takes in, or absorbs, sound waves. However, snow can become hard and flat as it becomes older or if there have been strong winds. Then the snow''s surface will help to send back sound waves. Under these con***ions, sound may seem clearer and travel farther.
Generally, the colour of snow and ice appears white. This is because the light we see from the sun is white. Most of natural materials take in some sunlight. This gives them their colour. However, when light travels from air to snow,sunlight is sent back, or reflected. Snow crystals have many surfaces to reflect sunlight. Yet the snow does take in a little sunlight. It is this light that gives snow its white appearance.
Sometimes, snow or ice may appear to be blue. The blue light is the product of a long travel path through the snow or ice. In simple terms, think of snow or ice as a filter. A filter is designed to reject some substances, while permitting others to pass through. In the case of snow, all the light makes it through if the snow is only a centimeter thick. If it is a meter or more thick, however, blue light often can be seen.
Snow falls in extreme northern and southern areas of the world throughout the year. However, the heaviest snowfalls have been reported in mountains of other areas during winter. These areas include the Alps in Italy and Switzeland, the coastal moutains of Western Canada, and the Sierra Nevada, and Rocky Mountains in the United States. In warmer climates, snow is known to fall in areas over four thousand nine hundred meters above sea level.
Each year, the continental United States has an average of one hundred of snowstorms. An average storm produces snow for two to five days. Almost every part of the country has received snowfall at one time or another. Even parts of southern Florida have reported a few snowflakes.
The national records for snowfall in a single season was set in nineteen ninety eight and nineteen ninety nine. Two thousands eight hundred ninety five centimeters of snow fell at the Mt. Baker ski area in the north-western state of Washington.
People in many other areas have little or no snowfall. In nineteen thirty six, a physicist from Japan produced the first man-made snow in a laboratory. During the nineteen fourties, several American scientists developed methods for making snow in other areas. Clouds with extremely cool water are mixed with man-made ice crystals, such as silver iodide AHA and metaldehyde crystals. Sometimes, dry ice particles or liquid propane are used. Today, special machines are used to produce limited amounts of snow for winter holiday ski areas.
Snow is responsible for the deaths of hundreds of people in the United States every year. Many people died in traffic accidents on roads that are covered with snow or ice. Others died from being out in the cold or from heart attacks caused by extreme physical activity.
A few years ago, a major storm caused serious problems in the eastern United States. It struck the southeast in January nineteen ninety six before moving up the east coast. The storm was blamed for more than one hundred deaths. It forced nine states to declare emergency measures.
Virginia and West Virginia were hit hardest. In some areas there, snowfall amounts were more than one meter high. Several states limited driving to emergency vihicles. Most major airports were closed for at least a day or two.
A week later, two other storms brought ad***ional snow to the east coast. In the New York city area, the added heavy weight of snow forced the tops of some buildings to break down. Many travellers were forced to walk long distances through deep snow to get to train stations.
People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of winter snowstorms.
People should stay in their there homes until the storm has passed. While removing large amounts of snow they should stop and rest often.
Difficult physical activity during snow removal can cause a heart attack. It is always a good idea to keep a lot of necessary supplies in the home even before the winter begins. These supplies include foods, medicine, clean water and extra power supplies.
Some drivers have become trapped in their vehicles during a snowstorm. If it happens, people should remain in or near their cars unless they see some kind of help. They should get out and clear space around the vehicle to prevent the possibility of carbon monoxide gas poisoning.
People should tie a bright-colored object to the top of their car to increase the trend chance of rescue. Inside of the car, they should open a window a little for fresh air and turn on the engine for ten or fifteen minutes every hour for heat.
People living in areas where winter storms are likely should carry emergency supplies in their vehicle. These include foods, emergency medical supplies, and extra clothing to stay warm and dry. People in these areas should always be prepared for winter emegencies. Snow can be beautiful to look at, but it can also be dangerous.
This SCIENCE IN THE NEWS program was written by George Grow. Our producer was Cynthia Kirk. This is Steve Ember. And this is Bob Doughty. Join us again next week for more news about science in Special English on the Voice of America.
Great job!!

Cùng nghe 1 bài khá thú vị nhé các bạn:
''Phantom of the Opera'' Rewrites Broadway History After 18 Years
Một số tên riêng trong bài:
Steve Ember
Faith Lapidus
Gaston Leroux
Raoul
Jerilyn Watson
Katy Weaver
Enjoy

Cảm ơn chị @Maroon_Opal đã dành thời gian để check bài của em Hic, nhưng có một số lỗi sau em nghe đi nghe lại mà vẫn thấy là em đúng:
- is returning chị sửa thành has returned. 2 cái này sound hoàn toàn khác nhau mà, làm sao em make mistake đc ạ
- Celsius cái này em có thấy em sai gì đâu nhỉ
- the Alps in Italy
- a few snowflakes: có sai j đâu ạ
- The national records: của em cũng làm j có "s" ạ
Hình như chị mix bài của em với cả của chị sky_perfume thì phải
- This is Science in the News was written by George Grow and produced by Cynthia Kirk with audio Special English : cái này em nghe được chẳng giống với cái chị sửa gì cả Chẳng nhẽ tai em lại nghễnh ngãng đến độ này Chị check lại hộ em với

Sorry em chị check cái bài thứ 2 mà em post ý. Bài đấy là em e*** từ bài của sky_perfume. Tại chị có thói quen check bài cuối cùng. Sorry nhé

Để chuộc lỗi sẽ e*** lại bài của lovely_pig1987, mong em đừng dỗi nhé. Sorry again!
This is Steve Ember and this is Bob Doughty with Science in the News, a VOA Special English program about recent developments in science. Today, we tell you everything you ever wanted to know about snow.
Winter weather is returning to Northern areas of the world. In much of the United States, winter means the return of snow. Snow is a subject of great interest to weather experts. Experts sometimes have difficulty estimating where, when or how much snow will fall. One reason is that heavy amounts of snow fall in surprisingly small areas. Another reason is that a small change in temperature can mean the difference between snow and rain.
Snow is a form of frozen water. It contains many groups of tiny ice particles called snow crystals. These crystals grow from water particles in cold clouds. They usually grow around a piece of dust. All snow crystals have 6 sides, but they grow in different shapes. The shape depends mainly on the temperature and water levels in the air.
Snow crystals grow in one of 2 designs: plate-like and columnar. Plate-like crystals are flat. They form when the air temperature is about 15 degrees below 0 Celsius. Columnar snow crystals look like sticks of ice. They form when the temperature is about 5 degrees below 0 Celsius.
The shape of a snow crystal may change from 1 form to another as the crystal passes through levels of air with different temperatures. When melting snow crystals or raindrops fall through very cold air, they freeze to form small particles of ice, called sleet. Groups of frozen water droplets are called snow pellets. Under some con***ions, these particles may grow larger and form solid pieces of ice, or hail.
When snow crystals stick together they produce snowflakes. Snowflakes come in different sizes. As many as 100 crystals may join together to form a snowflake larger than 2 and 1/2 centimeters. Under some con***ions, snowflakes can form that are 5 centimeters long. Usually this requires near freezing temperature, light winds and changing con***ions in earth?Ts atmosphere.
Snow contains much less water than rain. About 15 centimeters of wet snow has as much water as 2 and 1/2 centimeters of rain. About 76 centimeters of dry snow equals to water in 2 and 1/2 centimeters of rain.
Much of the water we use comes from snow. Melting snow provides water for rivers, electric power centers and agricultural crops. In the Western of US, mountains snow provides up to 75% of all surface water supplies. Snowfall helps to protect plants and some wild animals from cold winter weather. Fresh snow is made largely of air trapped among snow crystals. Because the air has trouble moving, the movement of heat is greatly reduced.
Snow also is known to influence the movement of sound waves. When there is fresh snow on the ground, the surface of the snow takes in, or absorbed, sound waves. However, snow can become hard and flat as it becomes older or if there have been strong winds. Then the snow?Ts surface will help to send back sound waves. Under these con***ions, sound may seem clearer and travel farther.
Generally, the color of snow and ice appears white. This is because the light we see from the sun is white. Most naturally materials take in some sunlight, this gives them their color. However, when light travels from air to snow, sunlight is sent back or reflected.
Snow crystals have many surfaces to reflect sunlight. Yet the snow does take in a little sunlight. It is this light that gives snow its white appearance. Sometimes, snow or ice may appear to be blue. The blue light is the product of a long travel path through the snow or ice. In simple terms, think of snow or ice as a filter. A filter is designed to reject some substances while permitting others to pass through. In the case of snow, all the light makes it through if the snow is only a centimeter thick. If it is a meter or more thickc, however, blue light often can be seen.
Snow falls in extreme Northern and Southern areas of the world throughout the year. However the heaviest snowfalls have been reported in the mountains of other areas during winter. These areas include the Alps in Italy and Switzerland, the Coastal Mountains of Western Canada and the Sierra Nevada and Rocky Mountains in the United States. In warmer climates, snow is known to fall in areas over 4900 meters above sea level.
Each year, the continental of United States has an average of 100 snowstorms. An average storm produces snow for 2 to 5 days. Almost every part of the country has received snowfall at 1 time or 1 another. Even parts of Southern Florida have reported a few snowflakes. The national record for snowfall in a single season was set in 1998 and 1999: 2895 centimeters of snow fell at the Mount Baker Ski Area in the northwestern state of Washington.
People in many other areas have little or no snowfall. In 1936, a physicist from Japan produced the 1st man-made snow in a laboratory. During the 1940s, several American scientists developed methods for making snow in other areas. Clouds with extremely cool water are mixed with man-made ice crystals such as silver iodide and metal-dehyde crystals. Sometimes, dry ice particles or liquid propane are used. Today, special machines are used to produce limited amounts of snow for winter holiday ski areas.
Snow is responsible for the deaths of hundreds of people in the United States every year. Many people die in traffic accidents on roads that are covered with snow or ice. Others die from being out in the cold or from heart-attack caused by extreme physical activity. A few years ago, a major storm caused serious problems in the Eastern of United States. It struck the Southeast in January, 1996 before moving up the East Coast.
The storm was blamed for more than 100 deaths. It forced 9 states to declare emergency measures. Virginia and West Virginia were hit hardest. In some areas there, snowfall amounts were more than 1 meter high. Several states limited driving to emergency vehicles. Most major airports were closed for at least a day or 2.
A week later, 2 other storms brought ad***ional snow to the East Coast. In the New York City area, the added weight of snow forced the tops of some buildings to break down. Many travelers were forced to walk long distances through deep snow to get to train stations.
People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of winter snowstorms. People should stay in their homes until the storm has passed. While removing large amounts of snow, they should stop and rest often. Difficult physical activity during snow removal can cause a heart attacks. It is always a good idea to keep a lot of necessary supplies in the home even before winter begins. These supplies include food, medicine, clean water and extra power supplies.
Some drivers have become trapped in their vehicles during a snowstorm. If this happens people should remain in or near their car unless they see some kind of help. They should get out and clear space around the vehicle to prevent the possibility of cabin monoxide gas poisoning. People should tie a bright colored object to the top of their car to increase the chance of rescue. Inside the car they should open a window a little for fresh air and turn on the engine for 10 or 15 minutes every hour for heat.
People living in area where winterstorms are likely should carry emergency supplies in their vehicle. These include food, emergency medical supplies and extra clothing to stay warm and dry. People in these areas should always be prepared for winter emergencies. Snow can be beautiful to look at, but it can also be dangerous.
This is Science in the News program was written by George Grow and produced by Cynthia Kirk with audio...
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