Which type of dam is built to control downstream flooding?
a. flood-control dam
b. wing dam
c. hydroelectric dam
d. spillway dam
e. all types of dams
ANSWER: a
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A community may undergo a regime shift or a phase shift when ________
A) they suffer a natural fire or flood B) lose keystone species or suffer a major climatic change C) pollutants cause a rapid rise in mutations D) all invasive and exotic species are removed E) have too many symbiotic relationships among species
The plant debris of swamps turned gradually into coal after buried and heated. The sequence of coal formation is:
a. Bituminous Peat Lignite b. Peat LigniteBituminous c. Peat Bituminous Lignite d. LignitePeatBituminous
A(n) ________ is a step-like landform found above a stream and its floodplain. It is a remnant of an older flood plain or river-eroded flat surface.
A. levee B. upland plateau C. cut bank D. stream terrace E. incised meander
The climate in which temperatures average 25°C or more each month and total precipitation for the year is high is the ________ climate
A) marine west coast B) humid continental C) wet tropics D) humid subtropics E) highland