Page 114 - Science Course 2 (Book 2)

Mo10-L5b: What Changes Earth’s Surface?

Key Concept
Mo10-L5b What Changes Earth’s Surface?
What are Physical and Chemical Weathering?

What is the difference between physical and KEY CONCEPTS:
chemical weathering? 1. How do water, ice, and wind change Earth’s
surface?

Vocabulary A-Z
Let us learn some vocabulary

erosion
the moving of weathered material or sediment, from
one location to another.

deposition
the laying down or settling of eroded material.

SUMMARY
What are Physical and Chemical Weathering?

Physical weathering breaks down rocks into
smaller pieces but does not change the mineral
composition.

Chemical weathering changes a rock’s mineral
composition. This makes rocks weaker and
helps break down rocks into smaller pieces. mass wasting
the downhill movement of a large
mass of rocks or soil due to gravity.

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