A: Right
B: Wrong
C: Not mentioned
举一反三
- what the analogy is: which two things are being compared?The earth’s atmosphere is like a blanket of gases around the earth. It is only a thin layer but it helps to maintain the temperature of the earth, keeping us warm. It also offers a layer of protection from the intensity of the sun. A: earth’s atmosphere and a blanket B: earth’s atmosphere and gases C: earth’s atmosphere and a layer of protection D: earth’s atmosphere and a blanket of gases
- Without the atmosphere，we could not breathe． A: the air around the earth B: the height of the mountains C: the water in the ocean D: the size of the cities
- A variety of gases trapped in the Earth’s atmosphere can ensure life on Earth because they are ______.
- As we have learned, these greenhouse gases energy in the atmosphere and make the Earth warmer.
- Greenhouse gases are necessary to life because they trap energy in the atmosphere and make the Earth warmer.
内容
- 0
We should reduce the amount of greenhouse gases because it trap ______ in the atmosphere and makes the earth _______.
- 1
Greenhouse gases trap energy in the atmosphere and make the Earth warmer.
- 2
Earth's atmosphere is filled with CO and other _________ gases, nobody could breathe it. A: smelly B: dangerous C: active D: deadly
- 3
We know the atmosphere as ______. A: the total amount of oxygen over the earth B: mixture of gases surrounding the earth C: a source of storms D: the diffusion of waste gas
- 4
The method in which the greenhouse effect takes place is by A: gamma radiation from the earth is absorbed into the atmosphere by particulates B: beta radiation from the Sun is absorbed by water vapor C: ultraviolet radiation from the Sun is absorbed by ozone D: infrared radiation from the Earth's surface is absorbed by multiple gases in the atmosphere E: cosmic radiation from deep space is absorbed by gases in the atmosphere