Why is the ozone layer important?
A) It insulates Earth.
B) It increases the temperature.
C) It protects Earth from ultraviolet rays.
D) It stabilizes the atmospheric layers.
C
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How is the earth's climate defined?
A. daily weather conditions in a given region B. average daily temperature and precipitation. C. average weather conditions of the last five years D. average weather conditions over a period of at least 30 years E. average weather conditions over a period of more than 100 years
Geologists believe that ____________________ are the remains of reef structures from one of the first
photosynthesizing organisms. Fill in the blank(s) with the appropriate word(s).
Which of the following is a natural disaster?
A) A hurricane forming in the ocean B) A landslide striking a city C) A volcano erupting on an uninhabited island D) An earthquake occurring in the desert
Which continent had the greatest area covered by glaciers at the height of the Ice Age?
A) South America B) Asia C) North America D) Europe