Objective  Students will have an understanding of how rocks change due to weathering.

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Presentation transcript:

Objective  Students will have an understanding of how rocks change due to weathering.

 What are some ways that rocks can break down?  If you said water, wind, and other ways you correct!  What type of rock bits can rocks break into?  If you said other rocks, pebbles, sand, silt, and clay your correct!

Weathering Review

How Rocks Change  Rocks can change by  Today you will learn more about the other ways rocks can show weathering.

Types of Weathering  You already know rocks breakdown by wind and water. Rocks can also break down by gravity and living things.

Gravity  One way weathering can happen is by avalanches. A mass of snow, ice, and rocks falling rapidly down a mountainside.  Rocks fall with the snow and land on bottom.

Gravity  Another way is by landslides. Landslides take place when dirt, pebbles, rocks and boulders slide down a slope together.  Sometimes these landslides are small, and hardly noticeable. Other times however, they can be big, involving the entire side of a mountain.

Living Things  Plant Growth : Roots of trees and other plants grow in the cracks of rocks and pry them apart.  Perhaps you have seen this on sidewalks?

Living Things  Animal Actions : Animals dig in the soil and loosen and break apart rocks. A large number of animals make tunnels through hard rock and under the ground.

Living Things  Animal Actions : Even earthworms make tunnels in the ground which leads to breakdown of stones and rocks over a period of time.  Surface rocks also get crushed when animals tread/walk on them

WWhat are the 4 types of weathering wwind wwater ggravity lliving things AA large rock can be broken into smaller pieces. What are the smaller bits. rrock ppebble ssand ssilt cclay

Soap Rocks Experiment  Draw the picture of the soap bar on a piece of paper.  The bar of soap represents a rock and the water represents the ocean waves. before weathering after weathering  Write a hypothesis about what will happen to the rock. hypothesis

Soap Rocks Experiment before weathering after weathering  Watch as the waves move the rock. What is happening to the rock?  If you said weathering by water you are correct. The soap is being carried by the water and hitting other rock causing the rock to change its form.  If you said erosion you are also correct. The water is moving the rock around and around. The rock did not stay in the same place the whole time. hypothesis  Now what does our soap rock look like?  Draw a picture of the soap rock after it is taken out of the tub.  What was the out come of the experiment?  Write your results below your drawing. results

Video  Rock Cycle Video  ?v=D7WFeh30UpY ?v=D7WFeh30UpY  Magic School Bus Rocks and Rolls  ?v=YrC15uySkVE ?v=YrC15uySkVE