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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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 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
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