An electrically charged atom is an

A) ion.
B) isotope.
C) both of these
D) neither of these


Answer: A

Physics & Space Science

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Astronomers infer that the universe is expanding because distant galaxies all appear to ________

A) be made mostly of dark matter B) be moving away from us, with more distant ones moving faster C) rotate rapidly D) be growing in size

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Time is sometimes thought of as a fourth dimension of ______________

Fill in the blank(s) with correct word

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Weather occurs in the

a. stratosphere. b. troposphere. c. mesosphere. d. thermosphere.

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Which of the following is an example of adiabatic warming?

A) cyclone B) Chinook C) drought D) tornado

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