Plate Tectonics

Question 1

Inner core

Answer 1

Centre of the earth
Temp of 5500
Solid and made up of iron and nickel

Question 2

Outer core

Answer 2

Liquid layer made of iron and nickel

Similar temps turns to the inner core

Question 3

Mantle

Answer 3

Diameter of 2900
Made of magma
Upper parts are solid lower down it is soft and bendy

Question 4

Crust

Answer 4

Layer upon which we live

Continental and oceanic crust

Question 5

Continental drift

Answer 5

250 mill years ago the earth was one big continent called Pangea
This idea was proposed by James Wagner who’s German
The continents are slowing drifting apart
Continents fit together Africa and south americia
Same rock patterns on different continents

Question 6

Constructive boundary

Answer 6

The two plates move apart by convection currents that rise within the mantle. Magma rises and creates new crust

Question 7

Destructive boundary

Answer 7

When a oceanic plate meets a continental plate it is forced under as it is denser. This is called SUBDUCTION. This can cause earthquakes as it sinks magma melts it this can cause explosive earthquakes

Question 8

Conservative boundary

Answer 8

The plates move horizontally past each other. Nothing is destroyed or created. Sand Andreas falls

Question 9

Collision boundary

Answer 9

Two plates of the same density meet which means they buckle upwards . The Himalayas

Question 10

Volcanoes

Answer 10

Vent connecting magma to the earths surface

Question 11

Tiltmeters

Answer 11

Detect change in the slope

Question 12

Benefits of volcanoes

Answer 12

Ash produce very good soils for farming

Volcanic rocks are good for building

Question 13

Disadvantages of volcanoes

Answer 13

Can kill people

Economic activity can suffer

Question 14

Seismic wave

Answer 14

A wave that travels through the earth

Question 15

How does an earthquake happen

Answer 15

Plates on the earths crust move do to convection currents
Plates try to move past each other and stick. This causes tension
When the force overcomes the tension it releases a jolt

Question 16

Focus

Epicentre

Answer 16

Point underground where the jolt happens

The point on the surface above the jolt

Question 17

Magnitude

Answer 17

The amount of energy given out. Reported on a Richter scale

Question 18

Immediate effects of earthquakes

Knock on effects

Answer 18

Building collapse
Roads destroyed

People lose jobs
Tsunamis

Question 19

Limiting the damage

Answer 19

Emergency services can practise
Stockpile medicine and food
Contrsuct eaethwuake buildings

Question 20

Development

Answer 20

Change and growth and it occurring all over the world

Question 21

Indicators of led and medc

Answer 21

Life expectancy birth and death rate

Adult literacy

Question 22

Ledcs tend to have

Answer 22

Many people in poverty
Poor infrastructure
High unemployment

Question 23

Tsunami

Answer 23

A large wave of seawater causes by earthquakes under the water
The shock waves create small waves in the ocean they become larger as the water gets shallower

Question 24

Defend tsunami

Answer 24

Build sea wall

Question 25

Japan earthquake

Answer 25

Happens on 11 March 2011
Magnitude of 9.0
15000 dead

Question 26

Mount merapi

Answer 26

Located on the island of Java in Indonesia

It erupted on the 25th of October 2010 when the indo Austrian plate was subjected beneath the Eurasian plate