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Author Question: Coral reefs are made of: a. volcanic rock. b. metamorphic rock. c. gravel-sized marine sediments. ... (Read 162 times)

B

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Coral reefs are made of:
 a. volcanic rock.
  b. metamorphic rock.
  c. gravel-sized marine sediments.
  d. seaweed.
  e. limestone skeletons of tiny marine animals.

Question 2

The world ocean covers what percentage of Earth's surface?
 a. 1
  b. 21
  c. 51
  d. 71
  e. 91



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Mollythedog

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Answer to Question 1

E

Answer to Question 2

D





 

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