2.03 recognize the causes and effects of physical and chemical weathering 2.04 explain the process of weathering of rocks caused by changes in temperature. 2.05 compare and contrast erosion which results from the action of wind, ice, and water. Some changes in the earth's surface are abrupt while other changes happen very slowly. Rocks are slowly crumbling.
Winds grind down rocks.
Fields are losing their soil. Water carries away sediment and deposits it somewhere else. Gullies are being formed. The earth's surface is changing all the time. Water, wind, and ice are constantly at work, wearing away and building up the land.