1/25/13
- Alfred Wegener came up with the theory of continental drift.
- As evidence he used fossils in the Earth and rock types.
1/28/13
None!
1/29/30
None!
1/30/13
He used the fossils and rocks that were found on different continents and put them together to form one super continent. Continents fit together like puzzle pieces. Location change of Greenland. Mountain belts on coasts of countries. Climate changes proven by antarctica having plant and animal fossils which means that it had to be once closer to the equator to support life.
1/31/13
Mapping the sea floor provides support for plate tectonics because you can see the mountain ranges and other natural obstacles that were formed by plate tectonics. Also it shows that the sea floor is not flat.
2/1/13
Seafloor spreading is when magma rises through a crack in the sea floor and hardens. The hardened piece of magma sets in between the crack, but is too big to fit perfectly in the crack so it pushes the sea floor away. The ocean floor basically expands or grows.
2/5/13
None
2/6/13
- John Tuzo Wilson is famous for putting the idea of continental drift and seafloor spreading and came up with the idea of plate tectonics.
- Plate tectonics is the theory that different pieces of the Earth's crust (12 pieces in all) floating on the mantle.
2/12/13
- A continental/oceanic and oceanic/oceanic will cause volcanic mountains.
- Subduction is when a more dense plate collides with a less dense plate and the more dense plate sinks and pushes up on the less dense plate.
2/14/2013
A trench can be formed by an oceanic/oceanic boundary or an oceanic/continental boundary. Subduction occurs. It is convergent. it is destructive because there is subduction.
2/15/2013
1- It is a subduction zone. Continental/Oceanic convergent. A trench is forming.
2- There is convection occurring causing the oceanic plates to move away from each other. Divergent
9- There is subduction happening there. The oceanic plate is sinking beneath the continental plate. It is a trench. It is convergent. Oceanic/Continental.
13- That is a convergent oceanic/continental. The friction between the subducting plate causes there to be mountains. The magma is less dense.
10- There is subduction happening. The oceanic plate is sinking beneath the continental plate. The sinking plate is turning into magma.
8- A trench is forming there.
6- Divergent boundary. It is a ridge. It is also a rift valley.
2- There is convection occurring causing the oceanic plates to move away from each other. Divergent
9- There is subduction happening there. The oceanic plate is sinking beneath the continental plate. It is a trench. It is convergent. Oceanic/Continental.
13- That is a convergent oceanic/continental. The friction between the subducting plate causes there to be mountains. The magma is less dense.
10- There is subduction happening. The oceanic plate is sinking beneath the continental plate. The sinking plate is turning into magma.
8- A trench is forming there.
6- Divergent boundary. It is a ridge. It is also a rift valley.
2/19/2013
A- It is a divergent boundary and there is no subduction. There is an underwater rift valley forming there.
B- It is a convergent plate boundary. The oceanic crust is being subducted under the continental. The plate is getting destroyed and is turning into magma which forms volcanic mountains.
C- It is a subduction zone. That is a trench. The more dense oceanic plate is being subducted under the less dense continental plate.
D-
B- It is a convergent plate boundary. The oceanic crust is being subducted under the continental. The plate is getting destroyed and is turning into magma which forms volcanic mountains.
C- It is a subduction zone. That is a trench. The more dense oceanic plate is being subducted under the less dense continental plate.
D-
2/20/2013
- The landform being formed between the two peaks is a valley.
- The elevation of the tallest peak is somewhere in between 202-210.