How can feedback affect a system? Give examples of positive and negative feedback
What will be an ideal response?
Feedbacks can lead to steady state conditions (negative feedback loops) or disequilibrium (positive feedback loops. The reduction of wolves in Yellowstone, for instance, led to an increase in elk populations, which in turn led to a reduction in vegetation cover due to overgrazing.
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Soils composed mostly of primary minerals will tend to have a higher percentage of ________ and a lower percentage of ________ than soils composed mostly of secondary minerals.
A. clay; sand B. silt; sand C. clay; silt D. sand; clay
Streams with broad, shallow channels and narrow, deep channels have a higher flow velocity than do those with semi-circular channels
Indicate whether the statement is true or false
What do Judaism, Christianity, and Islam have in common? a. All started in Turkey and slowly spread south
b. All were imported to the Middle East by westerners. c. All are polytheistic. d. All regard Abraham as their patriarch. e. All are proselytizing religions.
Use the above diagram of the ocean floor to answer the following question.Which number corresponds to the oceanic trench?
A. 1 B. 2 C. 3 D. 4 E. 5