A difference in air density can cause
A) refraction.
B) reflection.
C) scattering.
D) absorption.
Answer: A
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The ________ jet stream has a substantial influence on the weather of mid-latitude areas
Fill in the blank(s) with the appropriate word(s).
Ultraviolet radiation, X-rays, and extreme temperatures are all _____
A)chromosomes B)populations C)genes D)mutagens E)mutations
A ball is thrown straight up about fifty meters into the air. As the ball is traveling toward Earth and returning to the person who threw it, which of the following is most likely to be true?
a. The speed of the ball is increasing b. The potential energy of the ball in increasing c. The mass of the ball is decreasing d. The frictional force of air resistance acting on the ball is decreasing
This diagram features a
A. anticyclone, southern hemisphere. B. anticyclone, northern hemisphere. C. cyclone, southern hemisphere. D. cyclone, northern hemisphere.