Deforestation ________
A) causes population explosions
B) has the greatest impacts in tropical areas and arid regions
C) is not widespread in North America
D) decreases carbon dioxide in the atmosphere
E) prevents erosion
B
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The ____________________ suggests that, on average, loss of 90% of the habitat in an area causes extinction of about 50% of the species in that area.
Fill in the blank(s) with the appropriate word(s).
Which of these numbered features contains most of Earth's water?
A) 1 Oceans
B) 2 Atmosphere
C) 3 Glaciers and ice sheets
D) 4 Groundwater
E) 5 Lakes
How is an alluvial fan formed?
A) A stream erodes down through older terraces and entrenched meanders. B) Sediment is deposited by debris flows and streams that decrease in velocity along the mountain front. C) A landslide blocks the stream, causing sediment to accumulate upstream. D) A dam increases the speed of currents below the dam.
Which of the following is a metamorphic facies?
A) Kaolinite B) Staurolite C) Eclogite D) Quartzite