Weathering and Erosion Processes

What is weathering?

• The movement of rocks from one place to another.

• The dropping off of sediments.

• The breaking down and changing of rocks.

• The building up of new rocks.

What is erosion?

• When rocks are broken into smaller pieces.

• The transportation of sediments.

• The process of rocks becoming bigger.

• When rocks change their chemical makeup.

What happens during deposition?

• Rocks are broken apart.

• Sediments are moved to a new location.

• Sediments are dropped off and settle.

• Rocks change their color.

In the video's analogy, what does the dump truck represent?

• Weathering

• Erosion

• Deposition

• Physical Weathering

What is physical weathering?

• Rocks changing their chemical composition.

• The breakdown of rocks into sediments without changing what they are made of.

• The movement of rocks by water.

• The building of new rock formations.

What happens when water freezes inside cracks in rocks?

• The water shrinks and makes the cracks smaller.

• The water expands and pushes the cracks wider.

• The water turns into gas and disappears.

• The water changes the rock's color.

What causes the outer layers of rocks to peel away in a process called exfoliation?

• Strong winds blowing sand against the rock.

• Plant roots growing into the rock's cracks.

• Repeated heating and cooling of the rock.

• Water dissolving the rock's minerals.

Which type of weathering involves rocks grinding against each other?

• Frost action

• Exfoliation

• Abrasion

• Root wedging

How do plant roots contribute to breaking down rocks?

• They release chemicals that dissolve the rock.

• They grow larger inside cracks, pushing the rock apart.

• They absorb all the water, making the rock dry and brittle.

• They attract animals that dig into the rock.

What process causes rocks to turn a rusty, orangey color?

• Water freezing and expanding in cracks.

• Iron in the rock reacting with oxygen.

• Plant roots growing into the rock.

• Rocks rubbing against each other.