Today’s Agenda… Bellringer: Worksheet Review Weathering Turn in your quiz from yesterday if you have not already! Notes on Erosion Revisit our examples

Erosion Study Pack #9

What is erosion? The process of moving rocks or particles from place to place How is it different than weathering? How do they work together to change Earth’s surface?

What causes erosion? Today we will talk about... Gravity Ice Wind Water

Gravity Gravity pulls everything on Earth toward its center Gravity causes: Water to flow downhill Rocks to roll down mountains

Gravity When gravity alone causes rocks (or sediment) to move down a slope, it is called mass movement Four types of mass movement are: Creep Slump Rock Slides Mudflows

Gravity Read about the four types of mass movement in your book Discuss them with a partner What are they? What are the differences between the four? Have you ever seen any of these occur or have you seen the effects? What are the effects?

Ice Glaciers are large pieces of ice Glaciers move downhill because of gravity They pick up sediments and carry them

Ice Glaciers remove the lose pieces of rock from weathered rocks Glaciers carrying these rocks can scratch and erode rocks as they move

Ice What are the effects? Glaciers can remove rock from mountain tops Produce wider, u-shaped valleys Figure 12, page 327 Glaciers lay down sediments and then they are washed away