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Author Question: Over the span of 70 million years, Earth's climate A) was much cooler in the distant past than ... (Read 124 times)

lindiwe

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on: Jul 14, 2018
Over the span of 70 million years, Earth's climate
 
  A) was much cooler in the distant past than the present.
  B) has remained fairly constant, only showing a warming trend during the past 200 years.
  C) was much warmer in the distant past than the present.
  D) was warmest approximately 10 million years ago and coolest about 56 million years ago.

Question 2

In 1974, Dr. Rowland and Dr. Molina made what observation regarding ozone (O3)?
 
  A) Ground-level O3 irritates human eyes and respiratory systems.
  B) Anthropogenic O3 releases were a major culprit in global warming.
  C) The photochemical interactions of chlorofluorocarbons and O3.
  D) Automobile exhaust and sunlight were producing photochemical smog.


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Kedrick2014

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Reply #1 on: Jul 14, 2018
Answer to Question 1

C

Answer to Question 2

C


lindiwe

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Reply 2 on: Jul 14, 2018
Thanks for the timely response, appreciate it

nathang24

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Reply 3 on: Yesterday
Excellent

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