Upload
teresa-weaver
View
227
Download
4
Tags:
Embed Size (px)
Citation preview
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
Plate Tectonics• Tectonic
plates=enormous moving pieces of the earth’s lithosphere
• Continents split apart due to the movements of tectonic plates
1. Diverging Plates spread
apart *The space between is filled with
magma, which forms underwater mountain ranges
http://earthquake.usgs.gov/learn/animations/animation.php?flash_title=Divergent+Boundary&flash_file=divergent&flash_width=500&flash_height=200
An effect of divergent plate movement is a…VOLCANO!
Ring of Fire: zone around the Pacific plate known for multiple volcanic eruptions/earthquakes
One plate moving under another* “sub”=under, like
submarine
2. Convergent :Subduction
http://earthguide.ucsd.edu/eoc/teachers/t_tectonics/p_subduction.html
* “con”=to come together
like “con”vention*When the plates collide,
they create large mountain ranges like
the Himalayas.
3. Convergent: Collision
Plates come together
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
Earthquakes
• Caused when tectonic plates grind or slip
• Richter Scale: scale that rates earthquakes (1=10)
Tsunamis• BBC
NEWS | World | The tsunami disaster explained
A giant wave caused by an earthquake on the ocean floor.
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.
Learning Goal:
• Describe mechanical and chemical weathering.
• Explain how water, wind, and glaciers affect the development of landforms
• Identify the basic components of soil
Mechanical Weathering
• Processes that break rock into smaller pieces.
• Does not change composition of rock—just its size
Chemical Weathering• When composition of
rock is changed due to elements in the water and air which decompose the rock
• Ex: when iron rusts
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
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.
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