In which of the following radiation detectors is a gas ionized?
A) a Geiger-Müller counter
B) a scintillation counter
C) both a and b
D) neither a nor b
A
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A region with a small amount of arable land and a large number of farmers will have a(n)
A) efficient agricultural practice. B) low physiological density. C) overpopulation. D) high agricultural density. E) low arithmetic density.
True or False: Volcanic bombs do not explode
Fill in the blank with correct word.
Animals that can live for extended periods on land, but must return to water-based environments
to reproduce:a. hominids d. mammals b. plankton e. amphibians c. reptiles
A poleward moving (northward moving in the Northern Hemisphere) ocean current is:
A) either a warm or a cold current. B) a cold current. C) warm in summer and cold in winter. D) a warm current.