Air molecules selectively scatter visible light because ____
a. they are smaller than the wavelength of visible light
b. they are much larger than the wavelength of visible light
c. they are the same size as the wavelength of visible light
d. they are unable to absorb electromagnetic waves
e. the electrons that orbit around the nucleus of atoms have a blue color
ANSWER: a
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Which of the following describes the most likely situation when the temperature of the air is at absolute zero?
A. The rate of molecular motion is at its maximum. B. Molecules contain a minimum amount of energy. C. Molecules occupy a large volume. D. The air temperature is 0°C.
A conformal map projection is one that
A) is based on the idea of projecting the image on all or part of the globe onto a cone. B) preserves (i.e., does not distort) the shapes of features, like countries or continents. C) preserves (i.e., does not distort) the area of features, like countries or continents. D) allows only a hemisphere or less of the Earth's surface to be shown on a map.
Smaller grid spacing ____ the resolution of computer forecasting models
A) can decrease B) does not change C) can increase D) can vary
The longest days of the year in the Northern Hemisphere are experienced during the
A) time of 24-hour days at the South Pole. B) vernal equinox. C) winter solstice. D) autumnal equinox. E) time that the Sun is directly overhead at the Tropic of Cancer.