1. INTERNAL FORCES THAT SHAPE THE EARTH
Chp. 2 Section 3

2. Explain plate tectonics and the effects they have on our planet
Learning goal:
Explain plate tectonics and the effects they have on our planet

3. Continental Drift Theory
All continents had once been joined together in a super- continent called Pangaea, but slowly drifted apart.
Evidence: the same crocodile fossils were found in Brazil and South Africa
Evidence: continents can fit together like puzzle pieces

4. Plate Tectonics
Tectonic plates=enormous moving pieces of the earth’s lithosphere
Continents split apart due to the movements of tectonic plates

6. 4 Types of Plate Movement

7. 1. Diverging Plates spread apart
1. Diverging
Plates spread apart
*The space between is filled with magma, which forms underwater mountain ranges

8. An effect of divergent plate movement is a…VOLCANO!
Ring of Fire: zone around the Pacific plate known for multiple volcanic eruptions/earthquakes

9. 2. Convergent :Subduction
One plate moving under another
* “sub”=under, like submarine

10. 3. Convergent: Collision
* “con”=to come together like
“con”vention
*When the plates collide, they
create large mountain ranges like the Himalayas.
Plates come together

11. World’s tallest: Mount Everest

12. Plates slide past one another
4) Transformation
Plates slide past one another
When plates slide past one another at a fault, like the San Andreas, it can cause an earthquake
Fault= crack/joint in the earth

13. Earthquakes Caused when tectonic plates grind or slip
Richter Scale: scale that rates earthquakes (1=10)

15. Tsunamis A giant wave caused by an earthquake on the ocean floor.
BBC NEWS | World | The tsunami disaster explained
A giant wave caused by an earthquake on the ocean floor.

16. Create a newspaper article!
Pick an event: earthquake, volcano eruption, tsunami…Can be more than one! (i.e. earthquake & tsunami)
Explain exactly what happened. Be specific! Tell where this happened, tell what type of plate movement it was and explain how those plates move, explain the damage of the disaster.
Draw a picture to explain how this happened (plate movement arrows) and a picture of the damage it caused.

17. External Forces Shaping the Earth
Chp. 2 Section 4

21. Learning Goal: Describe mechanical and chemical weathering.
Explain how water, wind, and glaciers affect the development of landforms
Identify the basic components of soil

22. Weathering
Processes that change the
characteristics of rocks.

23. Mechanical Weathering
Processes that break rock into smaller pieces.
Does not change composition of rock—just its size

24. Chemical Weathering
When composition of rock is changed due to elements in the water and air which decompose the rock
Ex: when iron rusts

25. Erosion= wearing away of rock, land or soil by wind, water, ice or gravity

26. Water Erosion
One form of water erosion occurs when water flows in a stream or river
When a river enters the ocean, the sediment it picked up during flow is deposited in a fan-like landform called a delta

27. Wind Erosion
The wind picks up and transports sediment in different locations
Deposits of loess, or wind blown silt or clay, are found across the world.

28. Glacial Erosion
Glaciation is the changing of landforms by slowly moving glaciers

29. Article Title
Author Date
Pick an event: earthquake, volcano eruption, tsunami…Can be more than one! (i.e. earthquake & tsunami)
Explain exactly what happened. Be specific! Tell where this happened, tell what type of plate movement it was and explain how those plates moved, explain the damage of the disaster.
At least 10 sentences, be creative but still cover the content!
Draw a picture to explain how this happened
(illustrate the plate movements)
Draw a picture of the damage it caused
Keep it appropriate…
Caption explaining the above picture