Fusion G5 U8 Lesson 1

What will happen to rocks in a fast-moving river over time?

• They will absorb water and get larger.

• They will bump and scrape together, getting smaller and smoother.

• They will move into the shoreline and create more land.

• They will increase in mass and density.

What happens to rocks when water seeps into cracks and freezes?

• Nothing. The ice will melt and evaporate.

• Since the rock is flexible, it will expand and contract without consequence.

• The ice will cause the crack to expand, breaking the rock apart.

• The expansion of the rock will one break the rock if the crack is weak.

What type of experiment could scientists do to replicate the process of what happens to rocks in a river?

• Bury rocks under the soil near a riverbank.

• Leave the rocks exposed to the elements on the riverbank.

• Submerge the rocks in a pond.

• Tumble the rocks in a container with water and sediment.

The process of rocks breaking apart is called:

• weathering

• erosion

• deposition

• sedimentation

What's happening in this image?

• The tree roots are splitting the rock apart.

• The tree roots are holding the soil around the rock.

• The tree roots are an example of weathering.

• All of these answers are correct.

Landforms can be created by moving water over time. Which if these is an example of this relationship?

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Which of these is an example of chemical weathering?

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Wind, just like water, can cause erosion over time. Which of the following choices is an example of wind erosion?

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The dropping of weathered rock by wind or moving rock is known as:

• deposit

• demonstration

• deposition

• depletion

The process of moving weathered rock from one place to another is called:

• evacuation

• erosion

• expansion

• exportation