Compounds are ________
A) molecules that are made of more than one element
B) atoms that are radioactive
C) atoms that are electrically charged
D) molecules that are held together by atoms
E) molecules that have mass
A
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A ____________________ rock forms when a pre-existing rock is subjected to high temperatures, high pressures, chemically active fluids, or a combination of these agents.
Fill in the blank(s) with the appropriate word(s).
This is the most important process of cloud formation:
A) sublimation of glaciers. B) atmospheric cooling. C) the absorption of infrared radiation by water vapor. D) advection fog.
Which one of the following would release the lowest levels of particulates?
A) A nuclear power plant B) A city bus running on diesel C) A wood-burning stove D) A natural prairie wildfire
The Human Development Index (HDI) is a scale that takes quality-of-life features for individuals into account
a. True b. False Indicate whether the statement is true or false