Clouds continually are pulled to the ground by gravity. Why do they stay aloft?
A) Clouds weigh so little that they fall too slowly to be noticed.
B) Water evaporating from Earth's surface presents an opposing force to the falling cloud droplets.
C) New cloud droplets continually replace those that fall to Earth's surface.
D) Updrafts of air oppose the gravitational force.
D
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The policy of protecting domestic infant industries is referred to as the import-substitution method of economic growth
Indicate whether the statement is true or false.
Scientists use seismic tomography to ____
A)develop a three-dimensional model of Earth's interior B)determine the location of an earthquake's epicenter C)predict the timing and intensity of a future earthquake D)determine the depth of an earthquake E)decrease the intensity of an impending earthquake
Refraction occurs because radiation speed varies with
A) moisture. B) density. C) sunlight. D) temperature.
The subtropical high pressure regions are centered on approximately ____ degrees north and south latitude
a. 5 b. 30 c. 45 d. 60