1. Weathering, Erosion , & Deposition The Wearing Down and Building Up of Earth

2. Activating Prior Knowledge
Talk at your tables about what you ALREADY know about this topic.
What are these concepts?
What does it mean to us/the Earth?
How did the title slide persuade you? Etc.
Be ready to report out!

3. What we already know: Record in your notes what you already know.

4. Weathering
The process that breaks down rock and other substances at the Earth’s surface
Caused by: heat, cold, water, ice, oxygen, and carbon dioxide on the Earth’s surface!

5. Add to your notes! DESCRIPTION:
The process that breaks down rock and other substances at the Earth’s surface
WEATHERING

6. Add to your notes! CAUSED BY: HEAT COLD WATER ICE OXYGEN
CARBON DIOXIDE
WEATHERING

7. Two kinds of weathering
Both types of weathering act slowly, but over time they break down even the biggest, hardest rocks.
Physical, or mechanical, weathering
Chemical weathering

8. Mechanical Weathering
A rock is physically broken into smaller pieces
Affects all the rock on the Earth’s surface
Works very slowly, yet over time can eventually wear away a whole mountain

9. A rock is physically broken into smaller pieces!
Add to your notes!
MECHANICAL
A rock is physically broken into smaller pieces!

10. Mechanical Weathering
Freezing and thawing
Release of pressure
Plant growth
Actions of animals
Abrasion

11. Mechanical Weathering (Add list to notes)
Freezing and thawing
Release of pressure
Plant growth
Actions of animals
Abrasion

12. Talk With Your Group!
Where have you seen examples of Mechanical Weathering? Give at least 3 examples in your notes.

14. Chemical Weathering The composition, or make up, of a rock is changed
New minerals can be formed in a rock as it is broken down
Holes or soft spots can be created in a rock so it breaks apart easier

15. The composition, or make up, of a rock is changed
Add to your notes!
CHEMICAL
The composition, or make up, of a rock is changed

16. Chemical Weathering Put this list in your notes!
Water
Oxygen
Carbon dioxide
Living organisms
Acid Rain

17. Chemical Weathering Water Oxygen Carbon dioxide Living organisms
Acid Rain

18. Talk With Your Group!
Where have you seen examples of Chemical Weathering? Add to notes.

19. With your table, create a Venn Diagram to compare the two types of weathering. Add to notes.

20. Rate your learning….
Where are you on the generic learning scale (0-4) with:
Understanding mechanical weathering?
Understanding chemical weathering?
The difference between the two types of weathering?
END - Weathering

21. Erosion Erosion is the removal of rock particles from a location.
Caused by water, wind, ice, or gravity.

22. DISCUSS with your table:
What is the connection between weathering and erosion??
Why did we learn weathering first??
How does this affect the Earth? Us?

23. The movement of rock particles from a specific location
Add to your notes!
DESCRIPTION:
The movement of rock particles from a specific location
EROSION:

24. Add to your notes!
CAUSED BY:
WATER
WIND
ICE
GRAVITY
EROSION

25. WATER EROSION – add to notes
Water sources such as rivers, streams, ocean tides, and runoff can move rock particles away....
RIVERS
WAVES
RUNOFF

26. Water Erosion-Rivers
Rivers and streams carry sediment. As the sediment moves mechanical weathering occurs.
Through water erosion, rivers create waterfalls, flood plains, and valleys.

32. Water Erosion-Waves
Waves- waves shape the coasts by transporting sand. While the sand is moved, mechanical weathering occurs.
Waves create sea stacks, caves, arch, and wave-cut cliffs.

33. Erosion by Runoff
As water from precipitation (rain, snow, etc.) moves over the land, it carries particles with it. The moving water is called runoff.
Runoff creates rills and gullies.

34. WIND EROSION – add to notes
Sometimes the wind can move rock particles away: this can lead to dust storms!

35. Now stand up and whip nae nae

36. WIND EROSION
Wind Erosion creates dust storms, hoodoos, and arches.

37. Take a break and look at these Student Test Answers and smile

38. Ice Erosion – add to notes
As a glacier flows over the land, it picks up rocks in a process called plucking.

39. Ice Erosion
Ice erosion creates: U-shaped valleys, glacial lakes, moraines, drumlins, and kettle lakes.

40. Ice Erosion
Ice erosion creates: U-shaped valleys, glacial lakes, moraines, drumlins, and kettle lakes.

41. Think about it…. Water is NEEDED by all living things to survive.
How does water change the planet?

42. Erosion by Gravity – add to notes
Gravity causes sediment to move downhill.
It creates: landslides, mudflows, and creeps.

43. Analyze your learning in your notebook…
Compare the relationship between weathering and erosion to the relationship between convergent and divergent boundaries.

44. Rate your learning….
Where are you on the generic learning scale (0-4) with:
Understanding erosion?
The difference between weathering and erosion?
Understanding how weathering and erosion work together?

45. Weathering and Erosion work together continuously to wear down and carry away the rocks at the Earth’s surface!!!!!
END - Erosion

46. Deposition
Deposition is the process in which sediment laid down in new locations.
Caused by water, wind, ice, and gravity.

47. Think about it… Add to notebooks
What needs to happen before deposition can occur?
Why did we study deposition last in our weather, erosion, & deposition mini unit?

48. Add to your notes! Deposition:
Deposition is the process in which sediment is put down in new locations.
Deposition:

49. Add to your notes!
CAUSED BY:
water
wind
ice
gravity
Deposition

50. Deposition Wind Sand Dune Water *Waves *River *Beaches *Delta Ice
Type of Deposition
Creates
Picture
Wind
Sand Dune
Water
*Waves
*River
*Beaches
*Delta
Ice
Moraine
Gravity
Landslide, Slump, Creep

51. Rate your learning….
Where are you on the generic learning scale (0-4) with:
Understanding deposition?
The connection between weathering, erosion, and deposition?
Understanding why deposition was studied AFTER weathering and erosion?