In the United States, tornadoes typically move from:
a. southeast to northwest
b. northeast to southwest.
c. southwest to northeast.
d. None of these choices.
c
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Outwash is composed of:
a. silt, sand, clay, and boulders b. silt and clay c. silt d. sand and gravel
Most stream valleys have a V shaped cross section because ________
A) mass wasting of weathered rocks on the slope maintain an angle of repose slope. B) vegetation on the slopes forces this profile. C) water washing down the slope makes straight channels. D) none of the above
genetic drift and migration are mechanisms of evolution bt are not mechanisms of natural selection
a. true b. false
Brandon noticed that next to a construction site of a new shopping mall there was a new man-made pond. This artificial wetland/pond was constructed to ________.
A. to make the shopping area look more visually appealing B. flood control and nothing else C. to make a habitat for Canadian geese D. collect polluted storm water run-off from the parking lot in order to prevent it from getting into the natural streams and rivers.