A glacier is retreating when ____
a. accumulation exceeds ablation
b. snow changes into firn
c. accumulation and ablation are equal
d. ablation exceeds accumulation
e. basal slip exceeds plastic flow
d
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Tropical rainforests cover about__________% of the earth's surface, but contain about ________% of the earth's known terrestrial plant and animal species
Fill in the blanks with correct word
Oxbow lakes are always found ________
A) in steep, mountainous terrain B) in areas where the process of aquatic succession has occurred C) alongside a river D) in association with a larger lake E) in agricultural areas where oxen have traditionally been used to plow fields
The Environmental Protection Agency considers this city to have the worst ozone pollution
A) Los Angeles B) Chicago C) New York D) Phoenix
A climate found near the equator is
a. tropical wet or rain forest. b. tropical dry or savanna. c. Mediterranean wet summer. d. subterranean desert. e. humid subtropical.