The transfer of heat from one material to another through direct contact is known as:

A convection.
B conduction.
C evaporation.
D radiation.


Answer: B conduction.

Environmental & Atmospheric Sciences

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Indicate whether the statement is true or false

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A) further positive feedbacks. B) further negative feedbacks. C) a system that stays within certain limits. D) a system exceeding positive or negative feedback limits.

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In the late 1970s, the United States banned the non-essential use of chlorofluorocarbons (CFCs). Why?

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Environmental & Atmospheric Sciences