When using the dependency ratio, the age group considered to be the least dependent is ________.

A. 15-64 years
B. under 15 years
C. under 15 years and over 64 years
D. over 64 years


Answer: A

Environmental & Atmospheric Sciences

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Bioaccumulation is ________

A) the process by which chemicals are stored in the tissues of living organisms B) the chemical change that occurs when substances alter the growth and development of humans C) average length of time a molecule of a substance spends in the environment D) the total amount of chemicals stored in the tissues of living organisms E) the chemical change that occurs when substances are altered by the sun or metabolized by microorganisms

Environmental & Atmospheric Sciences

To qualify as an air mass, a large body of air must have the identically same temperature at the same altitude throughout the air mass, even if the body of air is 1,000 kilometers wide

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

A water budget is derived from measuring system inputs of precipitation and system outputs of evapotranspiration and runoff

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

In 300 B.C., Theophrastus, a pupil of Aristotle compiled all sorts of weather indicators in his book called ____________________

Fill in the blank with correct word.

Environmental & Atmospheric Sciences