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Author Question: What is a technique used to estimate past temperatures on Earth recorded in very old ice layers? ... (Read 105 times)

CharlieWard

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on: Jul 13, 2018
What is a technique used to estimate past temperatures on Earth recorded in very old ice layers?
 
 a. Ice coring
  b. Oxygen-isotope analysis
  c. CaCO3 analysis
  d. Radioactive decay

Question 2

Approximately how much of the freshwater on Earth exists in the frozen form, largely as ice and snow in the polar regions?
 
 a. 1
  b. 10
  c. 25
  d. 70


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Pswine

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Reply #1 on: Jul 13, 2018
Answer to Question 1

b

Answer to Question 2

d


CharlieWard

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Reply 2 on: Jul 13, 2018
Excellent

frankwu0507

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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