Geology Bundle 3

review

Layers of the Earth

Convection currents in the mantle drive the plate to move on the surface.

Pangaea

Wegener thought Africa and South America fit just about a perfectly.

2. Evidence for Continental Drift

• Evidence for :– Fossils of same organisms

found on different continents– SEA FLOOR SPREADING ocean

floor is getting bigger– Wegener thought Africa and

South America fit together like puzzle pieces

http://www.suu.edu/faculty/colberg/hazards/platetectonics/18_Pangaea.html

Sea floor spreading• http://earthguide.ucsd.edu/

eoc/teachers/t_tectonics/p_seafloorspreading.html

14. Plate Tectonics

Plate tectonics theory• That the lithosphere is

moving on the asthenosphere and plates:

• Converge (collide)• Diverge ( separate)• Transform (move past )Alfred Wegener’s theory Is the most widely Accepted.

HOW DO THEY MOVE?• Convection Currents in the

Mantle!!!!!

1 and 12 Sea Floor Spreading

Evidence for Continental Drift• Mid Ocean Ridge

• Where plates diverge • And magma seeps up • To create under water • Mountain ridges

7.Red lines are mid-ocean ridges where the sea floor is spreading

3 and 8. How do Mountains Form

3 types of plate boundaries• Convergent: plates collide• Divergent : plates separate• Transform: plate slide past

one another• Subduction is where a

continental plate and oceanic plate collide. The oceanic plate sinks beneath the continental plate.

CONVERGENT• Convergent Plates create

mountains.• Subduction can create

mountains and sometimes volcanoes.

10, 11 and 12 Contour maps • Show elevation and

shape of crustal features on the Earth’s surface.

• Usually start at sea level• The closer the lines the

steeper the incline• The smallest circle

represents the peak.• Look for the key just like

on a regular map

4, 6 and 13 Effects on land formations due to Weathering and Erosion

• The Grand Canyon was created by the process of weathering and erosion from the Colorado River that runs through it. Weathering is the breaking down and erosion is the carrying away of the canyon down the river. The sediment most likely accumulates near

the mouth of the river where it opens up to the ocean.

5 and 9 Past bundles Information

• Energy Transformations• From a Hot air balloon– Chemical to thermal to

Mechanical

• What causes opposite seasons in the hemispheres?

• THE TILT OF THE AXIS!!