Sedimentary rock is formed from loose grains of minerals or other rock. These loose grains are called sediment. and they are formed throuan weathering and erosion.
Weathering breaks down rocks into sediment. Water, wind, ice, and living things can all cause weathering. During weathering, sediment is not moved away from the place where it forms.
However, during erosion, sediment is moved from the place where it formed. Erosion happens when water, wind, or ice moves existing sediment, or creates new sediment and
moves it somewhere else.
Read the examples of how sediment can form. Select the example that describes erosion.
Rainwater collected in a crack in a rock and froze. The water expanded as it froze, splitting the rock into smaller pieces.
Tree roots grew between small cracks in a rock.
As the roots grew bigger, they broke the rock apart.
As a glacier moved over rock, ice at the bottom of the glacier ground the rock down into sediment. This sediment was carried away by the glacier.