Doppler radar determines precipitation ____ by measuring changes in the ____ of the reflected radio wave.
A) size; intensity
B) velocity; intensity
C) velocity; frequency
D) size; frequency
Question 2An object that we see as red ____ all visible radiation except red.
A) refracts
B) absorbs
C) reflects
D) diffracts
Question 3The average summer temperatures in the Southern Hemisphere are cooler than the average summer temperatures in the Northern Hemisphere because ____.
A) Earth is closer to the sun in January
B) Earth is farther from the sun in July
C) over 80 of the Southern Hemisphere is covered with water
D) the sun's energy is less intense in the Southern Hemisphere
Question 4The signal detected by a Doppler radar is a ____.
A) microwave emitted by lightning
B) sound wave produced by thunder
C) microwave reflected by precipitation
D) sound wave produced by wind shear
Question 5The ____ in the human eye allow(s) for the perception of colors in the visible light spectrum.
A) iris
B) cones
C) rods
D) cornea
Question 6On which date are the sun's rays closest to perpendicular to Earth's surface in the middle latitudes of the Northern Hemisphere?
A) March 21
B) June 21
C) September 22
D) July 21
Question 7Which instrument measures the speed at which precipitation is moving toward or away from an antenna?
A) radiosonde
B) anemometer
C) wind psychrometer
D) Doppler radar
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