At 0 Kelvin, ________
A) water boils
B) ice forms
C) ice melts
D) water freezes
E) molecular motion stops
Answer: E
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A deposit of volcanic tuff contains the isotope potassium-40, which is slowly decaying into argon-40. How might the apparent age of the sample be affected if the volcanic tuff is heated and remains heated for a long period of time?
A) The rate of decay will speed up. B) The sample will appear older than it really is. C) The sample will appear younger than it really is. D) Heat will have no effect on the age of the sample.
How long does it take for Earth to revolve around the sun?
A. one month B. one year C. one day D. one week
Polar air is often described as dry even though the relative humidity is high. This is because in polar regions, ____
A) the dew point and air temperature are normally close together B) there is a large separation between dew point and air temperature C) the air has a high absolute humidity D) there is a high dew point temperature
Energy can be extracted from tides by ________.
A. the rise and fall of the water B. only from diurnal tides C. the declination of the tides D. the horizontal movement of water in tidal currents E. the rise and fall of the water and the horizontal movement of water in tidal currents