Chapter 1. - The Structure Of The Earth

Question 1

What is the crust

Answer 1

The crust is a layer of solid rock that covers the surface of the earth and is divided into plater

Question 2

What is the mantle

Answer 2

Its hot molten magma under the crust and it flows in currents

Question 3

What is the core

Answer 3

Its under the mantle, its the centre of the earth and is very hot - between 3000 and 5000 degrees Celsius. Its divided into the inner and outer core. Its mostly made of iron and is solid in centre.

Question 4

What is the earths crust divided into?

Answer 4

Plates

Question 5

Explain what happens when two of the earths plates slide past each other.

Answer 5

Pressure builds up before the plates move and causes earthquakes

Question 6

What happens when two of the earths plates push together

Answer 6

The heavier plate sinks under the lighter plate. Huge pressure builds up along plate boundaries And causes Earthquakes, fold mountains and volcanoes occur

Question 7

What happens if two of the earths plates pull apart

Answer 7

Magma enters the cracks And forms volcanoes. Mid - Atlantic ridges are formed and new land is added. This new land forms island this is therefore a constructive plate boundary.

Question 8

Hat does plate tectonics mean

Answer 8

Its the study of the plate movements and their effects - folding, faulting, earthquakes and volcanoes.

Question 9

What are plate boundaries

Answer 9

They are the lines or edges where the plates meet.

Question 10

What is continental drift

Answer 10

It is the very small movement of the plates each year

Question 11

Why causes the plates to move

Answer 11

Convection currents cause the plates to move.

Question 12

What are convection currents

Answer 12

When magma is heated by the core, hot currents rise up in the mantle and join together or separate under the crust. This causes the plates to move together or separate. Where currents flow towards each other the plates collide; where the currents flow away from each other the plates separate.

Question 13

what is Pangaea

Answer 13

It is the way the continents were joined millions of years ago

Question 14

What are the features formed when plates collide

Answer 14

Earthquakes, volcanoes and fold mountains are formed when plates collide

Question 15

What are two examples of plates colliding

Answer 15

To examples of plates colliding are the Nazca plate colliding with the South American plate

Question 16

What is an example of where the plates collide

Answer 16

An example of where the plates collide is the Alps

Question 17

What features are formed when plates separate

Answer 17

When plates separate volcanoes, earthquakes and mid-ocean ridges are formed

Question 18

What Is an example of two plates separating

Answer 18

An example of two plates separating are the north American plate separating from the Eurasian plate

Question 19

What is an example of where the plate separate

Answer 19

An Example of where the plates separate is the mid-Atlantic Ridge

Question 20

What features are formed when plates slide past each other

Answer 20

Earthquakes are examples of what features formed when plates slide past each other

Question 21

What is an example of two plates sliding past each other

Answer 21

The North American plate sliding past the Pacific plate is an example of plates sliding past each other

Question 22

Is it example of where the plates slide past each other

Answer 22

An example of where the plates slide past each other is the San Andreas Fault in California

Question 23

Whta it the earth made of

Answer 23

The earth us made of the crust, mantle, inner core and outer core.