Plate tectonics (and a bit of structure of the Earth)

Question 1

What are plate tectonics?

Answer 1

The movement of the plates and the activity inside the Earth.

Question 2

A boundary where two plate move together is called a ________ boundary.

Answer 2

Convergent

Question 3

A boundary where two plate move apart is called a ________ boundary.

Answer 3

Divergent

Question 4

A boundary where two plate move past each other is called a ________ boundary.

Answer 4

Transform

Question 5

The plate on the west coast of South America.

Answer 5

Nazca plate

South American plate is to the East

Question 6

The Himalayas were formed by a _________ type of plate boundary.

Answer 6

Convergent

Question 7

Name the parts of the Earth, going from the deepest to the shallowest.

Answer 7

Inner core, outer core, mantle, crust.

Question 8

What is the thinnest crust?

Answer 8

Oceanic

Question 9

Name the layer beneath the crust.

Answer 9

Mantle

Question 10

Name the layer above the inner core.

Answer 10

Outer core

Question 11

Name the layer below the mantle.

Answer 11

Outer core

Question 12

Name the layer closest to the surface of the Earth.

Answer 12

Crust

Question 13

The Earth is a sphere with a diameter of about ________.

Answer 13

12 700 km.

Question 14

The circumference of the Earth at the Equator is ________.

Answer 14

40 075 km.

Question 15

The ____ is the layer beneath the crust and extends about _____ to the centre. It is made up of molten/liquid rock called ______ which is a very viscous substance.

Answer 15

Mantle
Halfway
Magma

Question 16

The outer core is made up of _____ ____ and _____.

Answer 16

Liquid iron, nickel

Question 17

The inner core has a temperature of around _____°C and is made up of solid iron and nickel due to the extreme_______ exerted on it

Answer 17

3500, pressure.

Question 18

What are convection currents?

Answer 18

Convection currents describe the motion of molten rock in the mantle. Convection currents move from the intense heat of the core to the cooler regions at the top of the mantle. These convection currents move through the magma and causes it to rise and fall.

Question 19

When the convection currents move apart near the Earth’s crust, plates ____ _____.

Answer 19

Move apart

Question 20

When the convection currents move together, the plates ____ _______ ____ _____.

Answer 20

Move towards each other