Weathering and Erosion Lesson

Learning Targets

I can model the effect of freezing water on rocks.

Model

I can plan and conduct an investigation to determine the

effect of acidified water on building materials.

Plan and
conduct

I can observe, record, and describe evidence of

weathering in my local environment.

Observe,

record, and

describe

Power of
Water

Water can shape landscapes and is a
powerful agent in weathering and erosion.

Water (rain, ice, snow) has shaped our environment by physically and
chemically weathering rock and soil and transporting sediments.
Let’s learn more about physical and chemical weathering and erosion.

Physical
Weathering

Freezing water can break rock
without any change in the
minerals that form the rock
(physical weathering).

This usually produces small
particles and sand.

Chemical
Weathering
Water, along with dissolved gases
and other chemicals, causes the
minerals in rocks to be changed,
leading to the deterioration of the
rock . This is known as chemical
weathering.

Example- acidified rain interacts with
limestone (CaCO3) in statues to
cause a chemical reaction.

Erosion

• Erosion is the movement of the

materials by water or wind. This
can happen after a big storm or
flood.

Weathering and Erosion Work
Together
• Weathering breaks

down rocks and
minerals into smaller
pieces

• Erosion moves rocks

and minerals

• This is how water can

change the landscape.

https://qsstudy.com/weathering/