Download Science: Earth`s Changing Surface

Science: Earth’s
Changing Surface
Chapter 3
Erosion & Deposition
Section 1
Earth’s Changing Surface
• Erosion is the process b which natural
forces move weathered rock & soil from
one place to another
• A landslide is a very rapid type of
erosion
• Gravity, running water, glaciers, waves,
& wind can all cause erosion
• Sediment is the material moved by erosion
• Deposition occurs where the agents of
erosion lay down sediment
• This changes the shape of the land
Weathering
• Weathering, erosion, and deposition act together in a
cycle that wears down and builds up Es surface
• Sometimes they work slowly
• At other times they work more quickly
• Gravity is the force that moves rock and other
materials downhill.
• Gravity causes mass movement
• The diff types of MM include landslides, mudslide,
slump, and creep
Landslides, mudflows…
• Landslides are the most destructive kind of mass
movement
• Some contain large rocks but many do not
• Mudflows are the rapid downhill movement of water, rock
& soil
• A slump is when a mass of rock and soil suddenly slips
down a slope
• This is one in which the material moves together
• Creep is the very slow downhill movement or rock & soil