Plate Movement Theory

Question 1

Wegner year

Answer 1

1912

Question 2

Wegener theory

Answer 2

Pangea supercontinent

Question 3

Explain Wegner’s theory

Answer 3

Supercontinent moved apart due to continental drift

Question 4

Proof of Pangea

Answer 4

Paleomagnetism

Question 5

Who discovered paleomagnetisn

Answer 5

Vine and Matthew’s

Question 6

Explain paleomagneism

Answer 6

Magnetic field reverses at times
Magnetic strips running parallel to the mid-Atlantic ridge. These strips corresponded to times when the earths magnetic field reversed from North to South
Iron particles in erupting magma either side of the ridge cooled and aligned themselves with the earths polarity at the time

Question 7

Hess theory

Answer 7

Sea floor spreading

Question 8

Sea floor spreading

Answer 8

Lateral movement of new oceanic crust away from the mid- ocean ridge. As lava erupts it cools and turns into new crust whilst older rock is pushed away from the ridge

Question 9

Wilson cycle

Answer 9

Continents move apart to form ocean basins then other oceans must close. Therefore if land moves apart to create rifts then it must move together