Weathering Erosion Deposition Activity 29 Earth Processes Destructive

Weathering, Erosion, & Deposition Activity 29

Earth Processes Destructive. Processes that break the Earth apart. Weathering Constructive – processes that build up earth material Deposition Destructive forces are not always harmful. Constructive forces are not always helpful.

Weathering The breaking apart of rocks. Wind, water, and animals are agents of weathering

Weathering When water falls onto rocks, it may freeze and expand. This eventually may cause the rock to crack. Water may also react with some chemicals in rocks, causing the rock to break down. As rock falls from a higher location to a lower location, it may break.

Erosion The transportation of weathered materials. Water cuts into rocks and forms Canyons. One famous example is the Grand Canyon

Erosion Land can slowly erode away, and when this happens, landslides can happen, roads can break apart. Slow and steady water erosion over long periods of time cause Lakes Rivers Hills Canyons Fertile plains

Erosion Effects of erosion can be slowed by: Planting vegetation Trees Grass Shrubs Creating Rock barriers piles Dams Fences

Deposition When erosion carries sediments from one place to another, and the sediments are left. Deposition cause the formation of new landforms. One example is a delta.

Deposition can be helpful in these ways: Sediments add nutrients to the soil Sediments can make new rocks Deposition can be harmful in the following ways: They can cover the habitat areas for fish and other animals They can build up and fill rivers, lakes, and other wetlands

People and Earth’s Processes Humans can accelerate Earth’s processes by: Construction Farming

Weathering, Erosion, or Deposition? Whiteboard Activity

Weathering, Erosion, or Deposition? Flood water pounding against a canyon wall Weathering

Weathering, Erosion, or Deposition? Rain washing away soil from a hillside Erosion

Weathering, Erosion, or Deposition? Layers of sediment forming at the bottom of the ocean Deposition

Weathering, Erosion, or Deposition? Caves being formed by acid rain dissolving underground limestone Weathering

Weathering, Erosion, or Deposition? A mudslide flowing down a steep hill Erosion

Weathering, Erosion, or Deposition? Deltas forming at the mouths of rivers Deposition

Weathering, Erosion, or Deposition? Wind blowing sand from one location or another. Erosion

Weathering, Erosion, or Deposition? Glaciers scraping across the earth’s surface Weathering

Weathering, Erosion, or Deposition? Muddy water being carried away by a fast moving river Erosion

Weathering, Erosion, or Deposition? Rocks being made smooth by tumbling across a streambed Weathering

Weathering, Erosion, or Deposition? Ponds filling up with sediment and becoming marshes Deposition