The statement that certain meteorites resemble the composition of the early mantle is

A) a hypothesis.
B) an assumption.
C) a theory.
D) an observation.


Answer: B

Environmental & Atmospheric Sciences

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The most abundant zooplankton are copepods

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

The pattern of absorbance of solar energy by the atmosphere includes

A. absorbance of infrared radiation by carbon dioxide and water vapor. B. a remarkable uniformity in the proportion of different kinds of wavelengths absorbed by ozone. C. heavy absorbance of visible light by carbon dioxide.

Environmental & Atmospheric Sciences

c____________ are generally soft-bodied animals that lack a rigid internal skeleton for the attachment of muscles, but

many possess some sort of hard, protective outer covering. Fill in the blank(s) with the appropriate word(s).

Environmental & Atmospheric Sciences

Although hydroelectric dams generate electricity without directly producing greenhouse gases, they ________

A) eliminate wildlife habitats and affect the temperature of waterways B) produce as much other air pollutants as coal-fired power plants C) are short-lived structures that have to be rebuilt about every 20 years D) contribute only about 5% of global electricity production

Environmental & Atmospheric Sciences