Geography

Question 1

Tectonic Plates

Answer 1

Earth’s hard outer part is broken into big slabs called tectonic plates

Question 2

Oceanic Crust

Answer 2

Crust under the oceans

Question 3

Continental
Crust

Answer 3

The crust that forms the land is called continental crust

Question 4

Convection
current

Answer 4

Soft rock is heated from below, the warmer rock rises through the mantle

Question 5

Constructive
plate boundary

Answer 5

Two plates move apart, e.g. Mid-Atlantic Ridge

Question 6

Destructive plate
boundary

Answer 6

An oceanic plate collides with a continental plate, e.g. Nazca and South American plate

Question 7

Conservative
plate boundary

Answer 7

Two plates slide past one another, e.g. Pacific
plate and North American plate

Question 8

Focus

Answer 8

Where an earthquake begins

Question 9

Epicentre

Answer 9

The area directly above an earthquake. This is where the most damage occurs.

Question 10

Seismic waves

Answer 10

The energy of the earthquake

Question 11

Crust

Answer 11

1. Thinnest layer of the Earth, between 6 - 50km thick.
2. It is thinner under the oceans than it is on land.
3. It contains rocks and minerals.
4. It is broken into several different sections called “tectonic plates”.

Question 12

Mantle

Answer 12

1. The thickest layer of the Earth (2900km).
2. This is made of solid rock that can flow (plastic rock)
3. It moves in big circles caused by “convection currents”. This is where the hot rock rises and the cold rock sinks

Question 13

Outer and Inner Core

Answer 13

1. Made of mainly iron and nickel.
2. The outer core is liquid.
3. The inner core is hotter, but the metals are solid.
4. The outer core is where the magnetic field comes from – this makes compasses work!
5. The outer core is 2220km thick.
6. The inner core has a radius of
   1260km

Question 14

Name the parts in the cross section of the Earth from inside to out

Answer 14

Inner Core
Outer Core
Mantle
Crust