What type of biome plays a critical role in the hydrologic cycle by storing ice and snow and covers about one-fourth of the earth's land surface?
A. forests
B. mountains
C. desert
D. grasslands
E. tundra
Answer: B
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If Fast Freda doubles her running speed, her
A. kinetic energy is quadrupled. B. momentum is doubled. C. both of these D. none of the above
Ecology is the study of how:
a. Atoms make up the environment. b. Humans affect the environment. c. Organisms interact with each other and their nonliving environment. d. Energy runs the environment. e. Evolution affects nature.
In the northern hemisphere, the earth's major ocean currents tend to circulate ____.
A. clockwise B. counterclockwise C. north to south D. east to west E. south to north
Why is Australia called the "lucky country"? a. Its population is particularly fertile and has high birth rates. b. It has little to no ethnic conflict
c. It has abundant natural resources. d. It was colonized by Great Britain. e. It is not a target of terrorists.