A: Because the sun gives the heat to the earth.
B: Because the moon gives the wind to the earth.
C: Because the earth rotates .
D: Because the sun's heat bounces to the space.
举一反三
- Animals and plants can live on the earth because ________. A: it is the right distance from the sun B: it has plenty of water C: the sun gives them warmth and light D: all of the above
- Why is more earth's heat blocked from escaping with more carbon dioxide in the atmosphere A: Carbon dioxide prevents the sun's energy from going back into space. B: Carbon dioxide radiates the sun's energy onto the earth. C: Carbon dioxide produces more heat in the atmosphere. D: Carbon dioxide takes in the sun's energy at infra-red wavelengths.
- The earth _______ round the sun, and the moon _________ round the earth
- When the sun's rays hit the earth, a lot of heat is __________ back into space. A: considered B: impressed C: eflected D: affected
- Small green plants are very important to dry places because ______. A: they don't let the sun make the earth even drier B: they don't let the wind blow the earth away C: all of the above
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A variety of gases trapped in the Earth’s atmosphere can ensure life on Earth because they are ______.
- 1
If the sun did not ____ heat, the temperature of the earth would fall almost to absolute zero.
- 2
______ is the center of our planetary system was a difficult concept to grasp in the Middle Ages.(1.0) A: It is the sun and not the earth B: Being the sun and not the earth C: The sun and not the earth D: That the sun and not the earth
- 3
____isthe center of our planetary system was considered as heresy by the church in the Middle Ages. A: It is the sun and not the earth B: That the sun and not the earth C: Being the sun and not the earth D: The sun and not the earth
- 4
Not only ______ us light, but also it gives us heat A: the sun gives B: the sun does give C: gives the sun D: does the sun give