Phosphorus cycles through the Earth's ecosystems:

A. Extremely quickly
B. Quickly when humans burn large amounts of fossil fuels
C. Only when activated by human activity
D. Very slowly
E. Very rarely


Answer: D

Environmental & Atmospheric Sciences

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Physical, chemical, and biological factors contribute to soil formation.

Answer the following statement true (T) or false (F)

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The atmosphere exerts an average force of approximately 1 kg/ (14.7 lbs/ ) at sea level

Indicate whether the statement is true or false

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Which feature is affected most by sea level change?

A. Continental rise B. Continental shelf C. Abyssal plain D. Oceanic ridges E. Oceanic trenches

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What percentage of Earth's water is freshwater?

A) 75% B) 20% C) 3% D) 40% E) 97%

Environmental & Atmospheric Sciences