In arid climates, most small streams are ________
A) nonexistent
B) ephemeral
C) intermittent
D) perennial
E) without channels
Answer: B
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Why isn't dirt listed in the periodic table?
A. Elements like dirt and air are so common that there is no need to list them in the periodic table. B. Dirt IS listed in the periodic table but is not easily recognized because it is listed as one of the rare earths with its old scientific name, dysprosium, symbol Dy. C. The periodic table lists only elements made of one kind of material. Dirt is a mixture of elements and compounds. D. None of the above is true.
Countercurrents are also known as undercurrents
a. True b. False
How did core samples drilled from various locations in the ocean floor support the concept of seafloor spreading?
a. Cores containing younger sediment were located closer to the ridge crest than were cores containing older sediment, meaning that older material is continuously being pushed away from the ridge. b. Cores containing younger sediment were located closer to the trench than were cores containing older sediment, meaning that older material is continuously being pushed away from the ridge. c. All cores contained sediment that was roughly the same age regardless of their proximities to the ridge crest. d. Cores containing older sediment were located closer to the trench than were cores containing younger sediment, meaning that older material is continuously being pushed away from the ridge. e. Cores containing older sediment were located closer to the ridge crest than were cores containing younger sediment, meaning that older material is continuously being pushed away from the ridge.
Floodplains are made ____
a. by tectonic activity b. by glaciation c. of alluvium d. artificially by people