Warmup 1 (1/25/13)
Alfred Wegener came up with the continental drift theory. It basically states that all the continents were once together in one large landmass called Pangea. Over time, it drifted apart. The evidence included the same rocks and fossils found on different continents.
Warmup 2 (1/30/13)
Alred Wegener used fossil evidence of animals and plants to develop his theory of continental drift.
Warmup 3 (2/1/13)
Seafloor spreading is the process of creating new rock of the sea floor. The convection of the magma from the mantle moves the plates which create gaps. Magma becomes lava and then rock. The ocean floor is growing
Warmup 4 (2/6/13)
John Tuzo Wilson came up with the theory of plate tectonics. Plate tectonics are the plates of crust that drifts upon the mantle.
Warmup 5 (2/12/13)
Convergent boundaries (continental-oceanic and oceanic-oceanic) and divergent boundaries causes volcanic mountains.
Subduction is when one of the plates (the more denser plate) sinks under the less dense plate. The plate underneath will melt into magma and recycled.
Subduction is when one of the plates (the more denser plate) sinks under the less dense plate. The plate underneath will melt into magma and recycled.
Warmup 6 (2/14/13)
At folded mountains, continental plates push into each other. A real life example would be the Himalayas. At ocean trenches, divergent plates move away from each other. A real life example would be the Great Rift Valley. At fault lines, transform plates move alongside each other in a motion called shearing. A real life example would be the San Andreas Fault.
Warmup 7 (2/15/13)
1. Convergent continental oceanic boundary
2. Magma convection is moving the plate
9. Point of subduction
13. Volcano forms on the edge of a oceanic continental convergent boundary
10. Denser plate is melting
8. Trench forms on the edge of a continental oceanic convergent boundary
6. Mid-ocean ridge is forming at a divergent boundary
2. Magma convection is moving the plate
9. Point of subduction
13. Volcano forms on the edge of a oceanic continental convergent boundary
10. Denser plate is melting
8. Trench forms on the edge of a continental oceanic convergent boundary
6. Mid-ocean ridge is forming at a divergent boundary
Warmup 8 (2/19/13)
A: an ocean ridge is forming by the divergent plate boundaries. The plates are pulling apart.
B: a continental-oceanic convergent plate boundary causes volcanoes to form on the continental plate and trenches to form at the oceanic plate. The denser plate sinks under the less dense plate.
C: The denser plate (oceanic) sinks under the less dense plate (continental). This process is called subduction. The oceanic plate is melted and and recycled.
D: a oceanic-oceanic convergent plate boundary builds trenches and islands. Subduction process is same as the continental-oceanic convergent plate boundar
Warmup 9 (2/20/13)
It might be a valley.
It is between 200-210 ft.
It is between 200-210 ft.