About ________ of the sun's incoming energy is reflected back into space.
A) a quarter
B) a third
C) two thirds
D) 99 per cent
Correct Answer:
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Q12: Constant bombardment of early Earth's nutrient-rich seas
Q13: Earth's first living cells were probably _.
A)
Q14: The kingdom characterized by a lack of
Q15: The kelp found in abundance along much
Q16: The sun is composed mainly of _.
A)
Q18: _ of the sun's incoming energy forms
Q19: Photosynthesis requires _.
A) solar energy
B) carbon dioxide
C)
Q20: Chemoautotrophs and phototrophs are both _.
A) decomposers
B)
Q21: Phototrophs obtain their energy from _.
A) producers
B)
Q22: Approximately _ of energy is lost as
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