Which of the following radioisotopes is used external to the body to deliver radiation to cancer cells?
A) C-14
B) Co-60
C) I-131
D) P-32
B
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How do existing nuclear power plants produce electricity?
A. Nuclear fission is used to heat water until it boils generating steam that spins a turbine. B. The blast from a nuclear bomb is used to turn wind turbines. C. Nuclear fission is used to melt salt that converts chemical energy to electricity. D. Nuclear fusion is used to heat water until it boils generating steam that spins a turbine.
The relationship between weathering and erosion can best be characterized as
A) weathering must happen before erosion can occur. B) weathering loosens material before erosion carries away, but erosion can also scour and move unweathered material. C) weathering must happen once erosion has moved material. D) weathering loosens material after erosion has carried it away, but erosion can also scour and move unweathered material.
Within the mixing zone and thermocline, average temperature and salinity primarily
A) remain fairly constant with depth. B) increase with depth. C) decrease within the mixing zone, but increases within the thermocline. D) remains constant within the mixing zone, but increases within the thermocline. E) decrease with depth.
The creation of many glacial lakes during the Pleistocene is labeled a(n) ________ development
A) random B) insignificant C) aeolian D) pluvial E) fluvial