Plate Tectonics and Volcanoes

Question 0

What are plates?

Answer 0

Crust broken into sections are called Plates

Question 1

What causes plates to move on top of the mantle?

Elaborate how it moves

Answer 1

When the hot core heats magma in the mantle.This sets up Convection Currents in the mantle.

There is a friction between the convection currents and the plates and causes the Plates to move slowly on top.

Question 2

Name the super continent that was once joined together.

Answer 2

Pangaea

Question 3

Name the three movement of the Plate.

Answer 3

Collision
Seperation
Passive

Question 4

What is magma?

Answer 4

Magma are melted rocks found in the mantle

Question 5

Name three activities that take place at the plate boundaries when the large plates move

Answer 5

Volcanic activity
Earthquakes activity
Mountain building activity

Question 6

Explain briefly how plates collide

Answer 6

When two plates collide,they build up a huge pressure.The heavier plate is forced downwards into the mantle where it melts.

Question 7

Explain briefly how plates seperate.

Answer 7

Plates pull apart due to Convection Currents.When plates pull apart,molten magma rises up from the mantle,where it cools and new crust is formed and the mid ocean ridge.

Question 8

Name two plates in collision

Answer 8

Nazca Plate and the South American Plate

Question 9

Name two plates that are moving apart

Answer 9

The American Plate and The Eurasian Plate

The American Plate and The African Plate

Question 10

True Or False?

No SINGLE plate can move without affecting the other

Answer 10

True

Question 11

Define the word Lava

Answer 11

When Molten magma reaches the Earth’s surface,this is called a Lava

Question 12

What’s the Mid Ocean Ridge

Answer 12

The Mid Ocean Ridge is an underwater mountain range

Question 13

Explain how did the mid ocean ridge form?

Answer 13

It was formed when two plates seperate from each other.
As the plates move apart,molten magma rises from the mantle and fills in the gap.It then cools and solidifies to form a new ocean floor.As the eruption of magma continue in an endless cycle,the ocean floor is built up to form a long ridge of mountains.

Question 14

Name the country where the mid ocean ridge is exposed

Answer 14

Iceland

Question 15

Name the three volcanoes in Iceland

Answer 15

Krafla
Hekla
Surtsey

Question 16

What’s Geothermal energy?

Answer 16

Hot Water or Steam from deep beneath the Earth’s surface is converted into Electricity.

Question 17

Name three advantages of having hot springs in Iceland

Answer 17

Generate Geothermal energy

Centrally heat houses in urban areas such as Reykjavik

Heat green houses for growing vegetables

Question 18

What’s a vent?

Answer 18

A hole in the crust where molten magma comes out or erupts

Question 19

Where is the Pacific Ring Of Fire?

What does it contain?

Answer 19

This is a zone that encircles the Pacific Ocean.

More than half of the world’s active volcanoes are found along the Pacific Ring Of Fire

Question 20

Name three types of Volanoes

Answer 20

Active
Dormant
Extinct

Question 21

Explain how magma comes erupts on a Volcano

Answer 21

1) Magma reaches the surface through a vent.It may erupt violently.
2) When Magma reaches the surface,it is known as lava. Lava pours out of the crater and flows down the side of the cone.It cools and hardens.
3) Other materials may also come out during the eruption.Layers of these materials build up to form a cone shaped mountain

Question 22

How are fold mountains formed?

Answer 22

When two plates collide,Great pressure is put on the plates.The rocks are compressed and this forces the rock layers to buckle and fold.

Question 23

Name two fold mountain ranges in Ireland

Answer 23

Comeraghs

Magillicuddy’s reeks