Removing large areas of trees in tropical rainforests can lead to drier conditions that make it difficult for a forest to grow back in the area. Such forest areas are often replaced by ____.
A. coniferous forests
B. deserts
C. savannas
D. rangeland
E. steppes
Answer: C
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Which is used to estimate how much oil in the ground can be extracted at a profit?
A. proven oil reserves B. speculation C. unproven oil reserves D. oil banks
High oxygen content in water is an indication that
A. Sewage, paper pulp, or food processing wastes have been added to the water B. There are no contaminants present at all C. There is a large population of coliform bacteria D. Water is only able to support algae and bacteria E. Water is clean enough to support game fish
Most orogenesis takes place on oceanic-oceanic convergent plate boundaries. Indicate whether the statement is true or false
The farther away a seismic station is from an earthquake's hypocenter the ________.
A. the longer the delay is between the arrival of the P waves and S waves B. more likely it is that only surface waves will be recorded C. the shorter the delay is between the arrival of the P waves and S waves D. more likely it is that only S waves will be recorded