The sun' s energy indirectly provides the earth with（）
A: fuels
B: waterpower
C: light
D: both A and B
A: fuels
B: waterpower
C: light
D: both A and B
举一反三
- The sun basically provides Earth with_____ source of energy everyday. (limit)
- How much energy given off by the sun reaches the earth A: 100 % but indirectly B: 5 % C: 50 % D: only a very tiny amount
- About____ of the sun's energy reaches the earth's surface. A: One -quarte B: One-third C: A half
- 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.
- Of the sun’ s total output of radiant energy, the earth receives （） A: one tenth B: one millionth C: all that comes from the surface of the sun D: a very small portion