A bass fiddle is louder than a harp because of its
A) thicker strings.
B) sounding board.
C) lower pitch.
D) all of the above
E) none of the above
Answer: B
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On a balanced seesaw, a boy three times as heavy as his partner sits
A) less than 1/3 the distance from the fulcrum. B) 1/3 the distance from the fulcrum. C) more than 1/3 the distance from the fulcrum.
The most numerous life on Earth is
A) insects B) plants C) human beings D) microbes
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Indicate whether the statement is true or false
Astronomical events, such as an asteroid impact or nearly supernova, have probably altered the course of evolution on Earth
Indicate whether the statement is true or false