Which of the following is a correct statement about cirrocumulus clouds?
A. They are larger than altocumulus clouds.
B. They consist of ice crystals.
C. They are middle clouds.
D. They are so thin that the sun can be seen through them.
Answer: B
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Repeatedly tap the side of a drinking glass with a spoon as you fill the glass with water and the pitch of the sound
A. increases. B. decreases. C. remains relatively constant. D. none of the above
Which of these statement about controlled nuclear fusion is accurate?
A. We have yet to find a way to make it work so that it is useful. B. So far, the tests have yielded a positive net energy. C. It costs considerably less than a conventional fission reactor. D. Bomb-grade materials are required as fuel sources.
A mountain or katabatic breeze is created when
A) air from lower elevations is heated more efficiently and rises, creating an upslope breeze. B) air from higher elevations is cooled more efficiently and sinks, creating a downslope breeze. C) air from lower elevations is cooled more efficiently and rises, creating an upslope breeze. D) air from higher elevations is heated more efficiently and sinks, creating a downslope breeze.
Rift Valleys mark zones where tectonic plates
B. collided C. slid past each other D. none of the choices are correct