The percentage of the Earth's surface covered by ocean is about

A) 50%.
B) 60%.
C) 70%.
D) 80%.
E) 85%.


C

Environmental & Atmospheric Sciences

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____________________ was a robust creature with a developed social structure. Fill in the blank(s) with the appropriate word(s)

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The term solution is synonymous with which of the following?

A) compound B) element C) heterogeneous mixture D) homogeneous mixture

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Which of the following compounds is likely to have the best water solubility?

A. CH3CH2CH2CH2CH2CH2CH2CH2OH B. CH3CH2CH2CH2CH2CH2OH C. CH3CH2CH2CH2OH D. CH3CH2OH

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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.

Environmental & Atmospheric Sciences