Used for class. Loads of fun.
1. Weathering, Erosion, and Deposition
2. Weathering Weathering is the breakdown of rock at the Earth’s surface.
Some of these changes happen quickly and some happen slowly.
There are 2 Types:
Mechanical and Chemical
3. Mechanical Weathering Mechanical Weathering – the type of weathering where rock is broken down into smaller pieces without changing the chemical properties of the rock.
This can be caused by freezing and thawing, release of pressure, growth of plants, and actions of
Water seeps into a crack in a rock
When the water freezes, it expands
The force of the water expanding causes the rock to crack more.
This is called ice wedging Freezing and Thawing
5. Plant Growth Roots of trees and other plants enter into cracks of rocks.
As the plants get bigger, so do the roots.
The growing roots force the cracks further apart.
6. Abrasion Abrasion is the grinding away of rock by other rock particles.
These particles scrape away at other rocks like sandpaper on wood as they rub or roll against the surface.
7. Chemical Weathering Chemical weathering is the processes of breaking down rock through chemical changes.
5 things that cause chemical weathering: water, oxygen, carbon dioxide, living organisms (like lichens) and acid rain.
Chemical weathering occurs more rapidly in warm wet climates.
8. Chemical Weathering causes the rock to experience a chemical change (changes its makeup)
Water dissolves rocks over time
Oxygen causes oxidation (rusting)
Acid rain reacts with marble and limestone
Living organisms – plant roots produce weak acids to dissolve rock around the roots, Chemical Change
10. CHECK- UP What type of weathering does each example cause?
The roots of a plant
An animal scratching
A. Chemical Weathering
B. Mechanical Weathering
C. Both types of weathering
20. Erosion When sediments are moved from one place to another by natural forces, this is called Erosion.
The agents of Erosion are
21. Sediment The material moved by erosion is sediment.
Sediment is small, solid particles of rocks or organisms.
22. Deposition When the sediment being carried is dropped (or deposited) in a new area, it is called deposition.
Depositions can create new landforms like beaches and sand dunes.
23. CHECK-UP Choose one of the following for each example:
2.)Deposition a. A river carrying sand
b. Dropping sediment in a new location
c. A glacier picking up a rock in it’s path.
d. A beach is formed.
e. How a sand dune is created
f. How sediment is moved
g. Sand being carried by the wind in a sandstorm.
36. WHO DONE IT? THE DELICATE ARCH VICTIM:
The Delicate Arch
Rounded edges from ABRASION.
37. WHO DONE IT? LANDSLIDE
38. WHO DONE IT? BEACHES GETTING SMALLER
39. WHO DONE IT?
40. WHO DONE IT? SANDSTORMS
41. WHO DONE IT?
DELTAS FORMING AT THE END OF RIVERS
42. WHO DONE IT?
THE GRAND CANYON
43. WHO DONE IT? GLACIAL GROOVES IN BEDROCK
44. WHO DONE IT?
45. WHO DONE IT? BEACHES GETTING BIGGER
46. WHO DONE IT? MUDSLIDES
47. WHO DONE IT? ROCKY BEACHES TURNING TO SAND
48. WHO DONE IT? SAND DUNES
49. WHO DONE IT? ROCKSLIDES