Weathering and ErosionWeathering and Erosion

Objective: Define and identify two Objective: Define and identify two types of slow processes that change types of slow processes that change

the landforms on our Earth.the landforms on our Earth.

Did You Know?Did You Know?

• Did you know that our Earth is changing everyday?

• Some changes happen quickly.

Example- Volcano

• Some changes happen slowly.

Example- Weathering and Erosion

What is Weathering and Erosion?What is Weathering and Erosion?

• Weathering- is the breaking down of rocks.

This is caused by- wind, water, ice, and root growth.

• Erosion- is the movement of rocks from one place to another. This is caused by- wind, water, and gravity.

$1,000,000.01 Questions!$1,000,000.01 Questions!

• Where does sand come from?

-from larger pieces of rock

• How is sand made?

-from weathering~ wind, water, ice,

root growth

Let’s look at how Let’s look at how landforms can weather landforms can weather and erode by the and erode by the windwind..

• This rock has been weathered by the wind.

Pieces of the rock eroded away by the wind

More landforms that have More landforms that have weathered and eroded by the weathered and eroded by the windwind. .

Let’s look at how Let’s look at how landforms can weather landforms can weather and erode by and erode by waterwater..

As the water moves, what might happen to the land over time?

This land has been weathered by moving water.

This land has been eroded by moving water.

More landforms that have been More landforms that have been weathered and eroded by weathered and eroded by waterwater..

Let’s look at how Let’s look at how landforms can weather by landforms can weather by iceice and erode by and erode by gravitygravity..

This rock has weathered by ice.

This rock has eroded by gravity.

Let’s look at how landforms Let’s look at how landforms can weather by can weather by root growthroot growth

and erode by and erode by gravitygravity..

Let’s review weathering and Let’s review weathering and erosion with a song!!!erosion with a song!!!

• Written by: Ms. Rich

• Sung by: A Class Full of Geologists