Forces that Change Earth’s Crust Eric Angat Teacher.

Forces that Change Earth’s

Crust

Eric Angat

Teacher

Essential Questions

How is the Earth’s crust changed or renewed?

Appalachian

Appalachian

weatheringerosion

deposition

bedding

1. What are the forces that change Earth’s crust?

1.10

Weathering, erosion, earthquake, tsunami, volcanic eruption, runoff, and flood.

2. How is weathering and erosion responsible for this?

Minerals in the middle of the rocks were more soluble with water.

3. Why are the rocks rounded and smooth?

Rocks crashing and rolling with each other because of the running water results to smooth and rounded stones in the river.

1. Slow changes Weathering, erosion rock cycle2. Rapid changes Earthquakes, volcanic

eruptions, floods

4. What changes the Earth’s crust?

Landforms change because of physical and chemical weathering and erosion.

5. How do landforms change?

1.36

6. What are the three main forces inside Earth?

1. Compressional stress causes a rock to shorten. 2. Tensional stress cause a rock to elongate, or pull apart. 3. Shear stress causes rocks to slip past each other.

7. What are Earth’s stress and strain?

1. "Stress" basically is the amount of force per unit area.

2. “Strain" is the amount of deformation or change of a material.

8. What are the different types of deformation.

1. Elastic deformation is a recoverable deformation.

2. Plastic deformation is a permanent strain.

3. Brittle deformation once a material has reached the elastic limit and breaks.

9. How is the Earth’s crust affected by weathering?

6.58

Weathering breaks rocks causing earth’s surface to change.

10.What type of climate is favorable for weathering?

a. warm and dryb. warm and moistc. cold and dryd. cold and moist

Weathering or breaking of rocks happens faster in warm and moist climate.

11. What type of weathering is frost wedging?

a. mechanicalb. chemicalc. erosiond. sedimentation

There are two types of weathering: Mechanical and Chemical weathering.

Water expands to 109% of its original size when it freezes .

12. How is weathering different from erosion and deposition?

5.55

Weathering

Breaking of rocks

into sediments.

Erosion

Moving of sediments.

Deposition

Settling of sediments.

deposition

erosion

erosion

Erosion

Big particles

Intermediateparticles Small

particles

Erosion happens

due to gravity.

13. What is the most common agent of erosion in the desert?

a. Rainb. snowc. haild. wind

Desert is a type of biome with ZERO or minimal precipitation.

Sand dunes are formed by WIND.

Slump Erosion- large segment of land moves.

Gravity

Ocean Water erodes the base.

Water erosion results to SLUMP due to gravity.

Gravity

Creep Erosion is slow movement (Gravity)

Gravity

Gravity

Slow movement

14. What is the agent of erosion responsible for slump and creep?

a. waterb. Living thingsc. gravityd. wind

Slump and creep are erosion caused by gravity.

erosion

No trees lead to erosion. Roots of trees bind the soil.

15. How could the removal of trees and other vegetation impact an environment?

A. by increasing oxygen productionB. by increasing soil formationC. by increasing transpirationD. by increasing erosion

artificial leveeshelp prevent flooding

16. Which is most likely a prevention strategy for flooding?A. building artificial leveesB. reducing water consumptionC. recycling bottled-water containersD. building waste landfills for metals and other contaminants

Wind blows the

sand

Desert is type of biome that has little or no precipitation.

17. Which agent of erosion leads to the formation of sand dunes?

A. iceB. windC. waterD. gravity

Water expands when it freezes causing frost wedging.

18. How can water be an agent for physical weathering?

A. by absorbing gases from the atmosphere and ground to chemically react with minerals

B. by seeping into the soil and dissolving the minerals in rocksC. by absorbing sulfur oxides and creating acid precipitationD. by seeping into the cracks of rocks and freezing

Surface AreaSurface area is the measure of how much exposed area a solid object has.

uncrumpled paper

crumpled paper

uncrumpled paper has higher surface area

19. Which of the following could increase the rate of chemical weathering of a rock?

a. moving it to a location with few plants and animalsb. moving it to a drier climatec. increasing its total surface aread. moving it to a colder climate

Erosion by water

No trees lead to erosion

Wind blows the

sand

Desert is type of biome that has little or no precipitation.

20. Why are wind, water, and gravity major agents of erosion rather than weathering? A. because weathering is often limited to

physical changes in earth materials B. because weathering is often limited to

chemical changes in earth materials C. because erosion involves the stationary

processes that break down rock D. because erosion involves movement of

earth materials from one location to another

21. How are landforms made by deposition?

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Deposition is the geological process whereby material is added to a landform. This is the process by which wind and water create a deposit, through the laying down of granular material that has been eroded and transported from another geographical location.

22. How are mountains formed?

Conclusions

1.06

Creep

Landslide, Mudslide, Slump, or Creep?

Creep

Landslide, Mudslide, Slump, or Creep?

Landslide

Landslide, Mudslide, Slump, or Creep?

Mudslide

Landslide, Rockslide, Mudslide, Slump, or Creep?

Rockslide

Landslide, Mudslide, Slump, or Creep?

Slump

References

http://scign.jpl.nasa.gov/learn/plate5.htm

http://en.wikipedia.org/wiki/Deposition_(sediment

)www.madison.kyschools.us/.../Weathering

%20...Madison County School