Heat transfer by radiation occurs via
a. electromagnetic waves
b. nuclear decay
c. molecular collisions
d. the solar wind
e. none of the above
A
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A lunar month is about 28 days. If the Moon were farther from Earth than it is now, the lunar month would be
A) more than 28 days. B) less than 28 days. C) about 28 days.
Strengthening by cooling a solid solution and forming small particles of a new phase is called _________hardening
Fill in the blank(s) with the appropriate word(s).
The Earth owes its habitability primarily to
A) the chemical composition of its surface B) a combination of its size and its distance from the Sun C) its size only D) its distance from the Sun only
The moon's velocity is directed
A) zero. B) backward, opposite to its direction of motion. C) forward, along its direction of motion. D) inward, toward the center of Earth. E) outward, away from Earth.