Westmount High School

Name: ______Date: ______

Grade 7 science

Westmount High School

Weathering and Erosion

1. Define Weathering:

2. What are the differences between chemical weathering and mechanical weathering?

3. Describe what water does to pavement when it continually freezes and thaws.

4. Specify what type of weathering (mechanical, chemical or biological) the following are examples of:

______a. Particles grind against rock

______b. Acid rain hits a limestone statue

______c. Rust forms on an old wheel barrow outside

______d. Rocks become smooth and round in shape in a stream

______e. Roots of a tree grow into the rock below

______f Rocks in a stream begin dissolving due to carbonic acid present

______g. Changes in temperature cause rock to break apart

5. What are the three stages of Erosion?

1.______2. ______3. ______

6. Describe two events that contributed to the area around Montréal being mostly flat today?