Continental Drift

Question 1

What is convection?

Answer 1

• Movement caused in a fluid due to heat and density. (dense material sunk, heat transfer occurs.)
• Happens in the mantle

Question 2

Sea floor spreading

Answer 2

Mid ocean ridges cause underwater mountains

Question 3

Paleomagnitism

Answer 3

Physical proof of continental drift. (Happens on land)

Question 4

Curie Point

Answer 4

Magnetite will point to magnetic North once it cools to 570oC

Question 5

Pillow Lavas

Answer 5

Outside cools, and is molten on the inside. Can also have magnetic properties.

Question 6

Inclination

Answer 6

Direction of Earths magnetic field lines

Question 7

Declanation

Answer 7

Angle of deviation b/w geographic north and magnetic north.

Question 8

Polar-Wander Curve

Answer 8

Suggests that continents that contain magnetic properties have meandered throughout time.

Question 9

Divergent

Answer 9

Apart (new lava is coming up)

Question 10

Convergent

Answer 10

Together (being destroyed)

Question 11

Rough estimate for the distance of seafloor spreading

Answer 11

10mm/year

Question 12

Earths cross section (Outside –> Inside)

Answer 12

1. Crust (Oceanic or continental)
2. Moho
3. Mantle
4. Liquid outer core
5. Solid inner core

Question 13

What does the “Moho” do

Answer 13

Separates the crust from the mantle.

Question 14

Earth compared to an egg shell (Outer to inner)

Answer 14

1. Lithosphere (Brittle)

2. Asthenosphere (white part underneath the shell

Question 15

Continental Crust vs Oceanic Crust:

Answer 15

Continental:
    -Less dense
    -More Si, Al
Oceanic:
    -More dense
    -More Fe, Mg

Question 16

Elastic deformation

Answer 16

the rock returns to its original shape when the stress is removed.

Question 17

Plastic deformation

Answer 17

when a rock, mineral, or other substance is stressed beyond its elastic limit