Tectonic plate movement is created by in the underlying mantle?

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

On nights when we see the new moon phase, what side of the moon are we seeing?

Which measure of humidity, relative humidity or dew point, best describes the actual quantity of water vapor in a mass of air