Page 133 - Science Course 2 (Book 2)
P. 133
Mo11-L2a: How Does Weathering Affect Earth’s Surface?
The process of changing the composition of rock Physical weathering exposes more surface area of
and minerals by exposure to water and the rocks, allowing more water and atmospheric gases
atmoshere is called chemical weathering. to enter rocks.
Gases in the atmosphere can cause chemical weath- Chemical weathering weakens rocks by changing
ering. the composition of some minerals and dissolving
Some Cause of Erosion others.
Rivers and Wave
Wind
Soil consists of weathered rock, mineral material,
water, air, and organic matter from the remains of
organisms.
Soil forms directly on top of the rock layers from
which it is made and is the result of hundreds to
Glaciers and Landslides thousands of years of weathering.
Key Concept
How Does Weathering Affect Earth’s Surface?
How does weathering change Earth’s surface?
125
