The troposphere extends from the Earth up to about _______________ km
Fill in the blank with correct word.
ANSWER: 18, eighteen?
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The coldest air is bound to be associated with a(n) ________ air mass
A) mP B) cP C) mT D) cT E) E
You are in an area that is relatively hot. You bend down and notice that there are tracks in the soil that are very old. Since you know that this area is easily destroyed by human activity and the harsh climate slows recovery from human damage, you conclude that this biome is
A. Tundra B. A tropical dry forest C. A wetland D. A desert E. A grassland
The world mid-oceanic ridge system totals approximately ________
A) 6 km (4 miles) B) 60 km (40 miles) C) 6,000 km (4,000 miles) D) 60,000 km (40,000 miles) E) 600,000 km (400,000 miles)
Biomass includes all:
A. Material in an ecosystem B. Biological material C. Things that are living at a given time D. Living and nonliving things E. Matter produced by primary producers