The region in which populations interact with each other and with the physical environment is called?
A. an entity.
B. an ecosystem.
C. a biosystem.
D. a community.
E. a biosphere.
Ans: B. an ecosystem.
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When a dropped apple hits the ground, the momentum transferred to the ground is
A. greater than the apple's whether or not bouncing occurs. B. a bit greater if the apple bounces. C. negligible compared to the momentum of the apple. D. none of the above
Which of the following cloud types might be indicated if a cloud appears white on a visible satellite image and grey on an infrared image?
A. stratus B. cumulonimbus C. cirrostratus D. altostratus
The best way to address obesity is with
A) a diet primarily of dairy products and whole grains. B) hard physical labor and a high protein diet. C) food aid and educational programs. D) a diet based on a balanced "food plate" selection, exercise, and limits on fats and sugars.
What are typical units of discharge?
A. meters per second B. cubic meters C. miles per hour D. cubic feet per second