Erosion and Deposition by Wind, Ice and Gravity

Weathering, Erosion & Deposition

Review

Weathering

-Breaks rocks apart

-Usually happens very slowly

-Agents of weathering include wind, water, ice, plant roots, gravity

-Creates sediment

Erosion

-Moves sediment

-Can happen quickly or slowly

-Agents of erosion include wind, water, ice (glaciers), gravity

Deposition

• Drops eroded sediment off in a different place
• Occurs when water slows down
• Results in the formation of a delta at the mouth of a river

Multiple Select

Check all of the agents of weathering.

• wind

• water

• gravity

• ice

Multiple Choice

When camping in west Texas, we wake one morning to discover that our car and tent are covered with a thin layer of sand. This is an example of:

• weathering

• erosion

• deposition

Multiple Choice

A beautiful display of bluebonnets bloomed along the bank of the river, but after the storm last night, the flowers and a large section of the soil in which they grew is gone. What is this an example of?

• weathering

• erosion

• deposition

Multiple Choice

When we walk along the seashore, we look for shark teeth in the sand. Sometimes we also find unbroken sand dollars, too. This is an example of

• weathering

• erosion

• deposition

Multiple Choice

This landform is created by deposition.

• mountain

• volcano

• delta

• mid-ocean ridge

Multiple Choice

As a river approaches the ocean, the water speed __________ and sediments are ______________.

• increases; deposited

• decreases; weathered

• decreases; weathered

• decreases; deposited

Multiple Choice

How does freezing water cause the weathering of rocks?

• It keeps the rocks in place.

• It expands cracks and breaks rocks.

• It makes the rocks last longer

• It causes rocks to fall in landslides

Poll

How are you feeling about the content we learned this week?

• Great! I could explain it to someone else easily.

• Getting there! I feel ok about this information but need some more practice.

• Not great yet, but I know that once I complete my assignments this week I'll be comfortable with the material.

• Not good at all. Help me!!