Clouds typically develop because ____
a. the temperature of a parcel of air increases
b. a parcel of air rises and cools
c. water vapor is added to a parcel of air
d. a parcel of air descends
e. condensation nuclei are added to a parcel of air
b
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A heavy pile driver starting from rest falls on a pile with a force that depends on the
A) original height of the driver. B) original potential energy of the driver. C) distance the pile falls. D) all of the above E) none of the above
Diamond can cut through quartz. What does this suggest?
A) Quartz is very weak. B) Diamond is very strong. C) Quartz is somewhat weak and diamond is somewhat strong. D) Both are very weak but diamond is only a bit strong.
The zone between the core and the crust is the:a
innersphere. b. lithosphere. c. mantle. d. convection center. e. molten zone.
Sea level is constant over long periods of the earth's history, and that is why it is used as a major datum for mapping elevations
Indicate whether the statement is true or false