Term 3 MTR Key Terms + More

Question 1

Continental crust

Answer 1

25-100km thick, mostly made of granite, less dense than oceanic crust

Question 2

Oceanic crust

Answer 2

5-10km thick, made from basalt, denser than continental crust

Question 3

The crust

Answer 3

-50 °C to 50 °C, made from rocks and soil, 5-100km thick

Question 4

The mantle

Answer 4

500-900 °C, consists mainly of magma, 2900km thick

Question 5

The outer core

Answer 5

4700 °C, rich in iron and nickel and lava, 2220km thick

Question 6

The inner core

Answer 6

5430 °C, hot solid ball of iron, 1260km thick

Question 7

Pangea

Answer 7

A super continent where all of the land was connected 250 million years ago

Question 8

Continent

Answer 8

One of 7 large land masses on earth

Question 9

County

Answer 9

A small part of a country

Question 10

Continental drift

Answer 10

Study of the movement, collision and division of continents

Question 11

Boundaries / Margins

Answer 11

The edges of the plate

Question 12

Constructive plate boundary

Answer 12

This is when two plates are moving apart. Next, a gap appears and molten magma fills the gap. A new crust will be formed.

Question 13

Destructive-Oceanic/Continental plate boundary

Answer 13

When two plates are pushed together and the heavier crust gets subducted. The plate then sticks and the magma in the mantle starts to melt the crust.

Question 14

Destructive-Collision plate boundary

Answer 14

When two plates crash into each other, and rocks get pushed up and folded.

Question 15

Conservative plate boundary

Answer 15

This is when two plates move past each other, but one is moving faster. Pressure and tension builds up.

Question 16

What causes the plates to move?

Answer 16

In the mantle, the heat rises and falls, crating convection currents which causes the plates to move

Question 17

Lithosphere

Answer 17

The crust and upper mantle