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TEXT G
First read the following questions.
83. The amount of solar energy that is absorbed as heat is _____.
A. 19%
B. 34%
C. 53%
D. 47%
正确答案是
Now read Text G quickly and select your answers.
Solar Energy
1. Sometimes your wet bathing suit dries before you have had a chance to change into your clothes. When seated by the window of a bus on a sunny winter day, you may feel very warm. These situations occur because solar energy is present. Solar energy is energy given off by the sun.
2. Imagine gasoline flowing over Niagara Falls at the same rate the water does. That would be 5 billion gallons (19 billion liters) of gasoline an hour! Suppose that all the flowing gasoline is collected for over 200 million years. If all that gasoline is burned, it would equal the amount of energy transmitted by the sun in one hour.
3. Not all the solar energy released by the sun reaches the earth's surface. About 34% is scattered into space by the gases or dust in the atmosphere. Another 19% is absorbed by the different layers of the atmosphere. The remaining 47% finally reaches the ground where it is absorbed as heat.