Answer:
there could be earthquakes which causes the land to break apart(weathering). or their could be a flood which carries away sediments( erosion) or their could be really windy days that picks up rocks and moves them (deposition)
Grain is t<span>he speckled appearance of a rock </span>
As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases. If the humidity is at 100 percent (because it's snowing), the temperature decreases more slowly with height.
