Page 112 - Science Course 2 (Book 2)

Changes on the Earth’s Surface Mo10-L5a: What are Physical and Chemical

Lesson 5 Weathering?

physical weathering
In this topic, you will learn the following the process of breaking down rocks and minerals
lessons: without changing their composition.
Mo.10–L5a: What are Physical and Chemical
Weathering?
Mo.10–L5b: What Changes Earth’s Surface?

What are Physical and Chemical
Mo10-L5a Weathering?

KEY CONCEPTS:
1. What is the difference between physical and
chemical weathering?

Vocabulary A-Z chemical weathering

Let us learn some vocabulary the process that changes the composition of rocks
and materials due to exposure to the environment.

weathering
the mechanical and chemical process that changes
Earth’s surface over time.

Let’s Begin

Breaking Down Earth Materials

sediment Weathering refers to the mechanical and chemical
rock material that from when rocks are broken down processes that change Earth’s surface over time.
into smaller pieces or dissolved in water as rocks
erode. The processes of weathering can break, scrape,
smooth, or chemically change rock.

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