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skyleton skyleton
wrote...
Posts: 463
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6 years ago
The ozone layer is valuable because it blocks
  a. heat.
  b. UV radiation.
  c. radio waves.
  d. asteroids.
  e. X-rays.

Question 2

The study of lifes origins and distribution in the universe is called
  a. astronomy.
  b. xenology.
  c. volcanology.
  d. lunology.
  e. astrobiology.
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Replies
wrote...
6 years ago
Answer to q. 1

ANSWER: b

Answer to q. 2

ANSWER: e
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