Alvarez and others proposed a hypothesis that dinosaur extinction occurred because ________.
A. the climate changed as the Ice Age began
B. they sickened and died because of a cross-species epidemic
C. the continents were flooded with seawater and they drowned
D. one or more asteroids impacted Earth, resulting in environmental change
E. all their eggs were eaten by birds and mammals
Answer: D
You might also like to view...
Most often, sediments found on the beaches of depositional coasts are supplied by ____
A) erosion of local coastal cliffs B) erosion of basement rock along the shoreline C) glacial processes D) rivers or ocean currents
Demand for health care and education has grown because
A) the aging baby boomers demand more health care services. B) increasingly sophisticated technology requires that workers be better educated. C) these services are so inexpensive. D) all of the above. E) A and B only.
New urbanism seeks to ________
A) keep business in a central location, near transportation centers B) provide low-cost, long-distance, mass transit systems C) use zoning to keep small neighborhoods intact D) use tiered taxation to maintain inner cities as vibrant, livable communities E) develop walkable neighborhoods, with homes and businesses close together
Under which conditions would evaporation take place at the quickest rate?
A. warm air over cold water B. cold air over warm water C. warm air over warm water D. cold air over cold water E. evaporation occurs at a constant rate