The average size of U.S. farms in 2000 was approximately ________ acres
A) 4,000 B) 100 C) 7,000 D) 1,000 E) 550
E
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The science of geology borrows principles and techniques from other sciences in order to determine what happened in the past. Which three sciences contribute knowledge and principles that geologists use to understand the natural world?
What will be an ideal response?
Identify two greenhouse gases.
A. nitrogen and oxygen B. carbon dioxide and oxygen C. methane and carbon dioxide D. oxygen and ozone
Pictured here is a model of how the atmosphere is heated. Which arrow represents heating of the earth's atmosphere by longwave radiation?
A) Insolation reflected by land
B) Insolation reflected by clouds
C) Energy absorbed by land
D) Infrared energy emitted by land
Which biome lacks trees, has widespread permafrost, and is the coldest on Earth?
a. tundra b. cryosphere c. temperate d. taiga e. xeric shrublands