Nitrogen fixation is accomplished by
a. Legumes
b. Bacteria
c. Algae
d. Protozoa
e. round worms
B
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AIDS is currently the biggest killer worldwide among communicable diseases
Indicate whether the statement is true or false.
How do deserts form in coastal tropical regions?
A. cold ocean currents B. rain shadow C. ascending air D. drought E. continental interiors
The diameter of the orbital path of a water particle near the surface is equal to ________.
A. 1 meter B. wave speed C. wave length D. water depth E. wave height
The length of time that a volcanic eruption impacts the climate is largely determined by:
A) how much ash is emitted. B) the explosive force of the eruption. C) how much gas is emitted. D) the amount of water evaporated. E) whether the ash or gas reaches the stratosphere.