Rocks on the east coast of South America match rocks on the west coast of North America.
a. true
b. false
Answer is b. false
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What has been identified as one of the five major causes of the environmental problems we face?
A. Perverse subsidies B. Hazardous waste C. Ignorance D. Corruption E. Poverty
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.
In ________ models, the Sun is assumed as the center of the solar system.
A. geocentric B. eccentric C. heliocentric
In what time of year do midlatitude beaches get smaller?
A) Spring B) Summer C) Fall D) Winter E) At no time; there is no seasonal pattern.