Upload
richard-doyle
View
230
Download
1
Tags:
Embed Size (px)
Citation preview
I. WeatheringA. Weathering is the process of breaking rocks
into smaller pieces.1. Mechanical Weathering happens when a
physical force breaks rocks apart.
What forces do you think might
break down rock?
I. WeatheringA. Weathering is the process of breaking rocks
into smaller pieces.1. Mechanical Weathering happens when a
physical force breaks rocks apart.a. Abrasion
1) Abrasion happens when rocks bump or scrape each other and break off pieces of each other.
2) Wind, flowing water, or glaciers can cause abrasion.
I. WeatheringA. Weathering is the process of breaking rocks
into smaller pieces.1. Mechanical Weathering happens when a
physical force breaks rocks apart.a. Abrasion …b. Ice Wedging
I. WeatheringA. Weathering is the process of breaking rocks
into smaller pieces.1. Mechanical Weathering happens when a
physical force breaks rocks apart.a. Abrasion …b. Ice Wedgingc. Plant root growth
I. WeatheringA. Weathering is the process of breaking rocks
into smaller pieces.1. Mechanical Weathering happens when a
physical force breaks rocks apart.a. Abrasion …b. Ice Wedgingc. Plant root growthd. Animal Actions
Why are these rocks that red-orange color?
Do you think rocks are more or
less likely to break if they
contain rusted iron?
I. Weathering
A. Weathering is the process of breaking rocks into smaller pieces.
1. Mechanical Weathering …2. Chemical Weathering happens when
chemicals in a rock react with other chemicals around it making the rock weaker.
1. Iron in rocks can rust. (oxidation)2. Acid rain can react with carbonate in rocks.
II. Erosion
A. Erosion occurs when rock or soil is carried away.
B. Causes of Erosion1. Water running down hill (rivers, streams)2. Glaciers (rivers of ice)3. Wind4. Gravity (landslides, mudslides)
III. DepositionA. Deposition occurs when soil or rock are set
down in a new location.B. Effects of Deposition
1. Rivers and streams create deposits called deltas and alluvial fans. (creates fertile soil)
III. DepositionA. Deposition occurs when soil or rock are set
down in a new location.B. Effects of Deposition
1. Rivers and streams create deposits called deltas and alluvial fans.
2. When wind deposits sand, it forms dunes.
III. DepositionA. Deposition occurs when soil or rock are set
down in a new location.B. Effects of Deposition
1. Rivers and streams create deposits called deltas and alluvial fans.
2. When wind deposits sand, it forms dunes.3. When waves deposit sand on the shore,
beaches form.
III. DepositionB. Effects of Deposition
1. Rivers and streams create deposits called deltas and alluvial fans.
2. When wind deposits sand, it forms dunes.3. When waves deposit sand on the shore,
beaches form.4. Sediments form layers that can eventually
become rock. (lithification)
Weathering and Erosion Supe r Hero Cartoonhttp://adventuresinscience.edublogs.org/tag/animation-videos/