Ch2

Question 1

The crust

Answer 1

Outside layer
Made of soil and rocks
Oceans and continents on top of the crust

Question 2

The mangle

Answer 2

Under the crust
Made of molten rock called magma
Magma is moved around by current

Question 3

The core

Answer 3

Centre of the earth
Ad eod iron and nickle
6,000 degrees Celsius
Inner amd outer core

Question 4

Layers the Earth is made up of

Answer 4

Crust
Mantle
Core

Question 5

What is the earths crust broken into

Answer 5

Plates

Question 6

What are continental plates

Answer 6

Plate swith land on top

Question 7

What are oceanic plates

Answer 7

Plates with oceans on top

Question 8

What is a plate boundary

Answer 8

The line where 2 plates meat

Question 9

What is magma in the mantle moved by

Answer 9

Convection currents

Question 10

Convection currents explained

Answer 10

1. When magma is heated it rises towards the crust
2. As it rises it cools moving sideways, causing friction between the crust and pulls the plates
3. The magma cools and sinks back down into the mantle
4. Constantly repeated

Question 11

What is plate tectonics

Answer 11

The study of plates and their movement

Question 12

What happens at plate boundaries : collide

Answer 12

Destructive boundries
Subduction (heavy plate under lighter plate)
Heavy plate melts into matle light plate lifts up to form fold mountains
Earthquakes and volcanoes
Ex the Andes

Question 13

What happens at plate boundaries : separate

Answer 13

Constructive boundaries
Magma rises to fill gap between plates, forming new crust( called sea-floor spreading)
Forms volcanic mountains and island and mid-ocean ridges
Ex iceland

Question 14

What happens at plate boundaries : sliding plates

Answer 14

Passive boundaries
Plares are locked together and realse a huge amount of energy when they slide past each other
Cause earthquakes and fault lines
Ex San Andreas Fault