Earth's Structure: Explore the Layers of Our Planet

Question 1

Which layer of the Earth is the hottest and experiences the most pressure?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 2

What is the boundary called that separates the Earth's mantle and core?

Accepted Answer

Gutenberg discontinuity

Answer

Moho discontinuity

Answer

Lithosphere boundary

Question 3

Which of the following is NOT a type of rock found in the Earth's core?

Accepted Answer

Granite

Answer

Iron

Answer

Nickel

Question 4

What is the process called that creates new crust at mid-ocean ridges?

Accepted Answer

Seafloor spreading

Answer

Subduction

Answer

Continental drift

Question 5

What is the main part of the Earth's crust made from?

Accepted Answer

Rock

Answer

Iron

Answer

Water

Question 6

How is new crust formed at the edges of tectonic plates?

Accepted Answer

Divergent boundaries

Answer

Erosion

Answer

Convergent boundaries

Question 7

What was the name of the giant continent that existed millions of years ago?

Accepted Answer

Pangaea

Answer

Gondwana

Answer

Laurasia

Question 8

Which layer of the Earth is the hottest and densest?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Answer

Atmosphere

Question 9

Which of the following materials is mainly found in the Earth's crust?

Accepted Answer

Silicates and aluminium

Answer

Iron and nickel

Answer

Water and carbon dioxide

Answer

Nitrogen and oxygen

Question 10

What is the process by which the Earth's plates move?

Accepted Answer

Convection

Answer

Radiation

Answer

Conduction

Question 11

What is the main component of the Earth's atmosphere?

Accepted Answer

Nitrogen

Answer

Oxygen

Answer

Carbon dioxide

Question 12

Which layer of the Earth is the thickest?

Accepted Answer

Mantle

Answer

Crust

Answer

Core

Question 13

What mineral is most abundant in the Earth's crust?

Accepted Answer

Silicon

Answer

Iron

Answer

Aluminum

Question 14

Which layer of the Earth is responsible for creating the magnetic field?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 15

Approximately what is the temperature of the Earth's core?

Accepted Answer

5,700 degrees Celsius

Answer

2,900 degrees Celsius

Answer

1,400 degrees Celsius

Question 16

Which of these statements about the mantle is incorrect?

Accepted Answer

The mantle is solid.

Answer

The mantle is convective.

Answer

The mantle is hot.

Question 17

What causes the Earth's crust to move?

Accepted Answer

Convection currents in the mantle

Answer

Earthquakes

Answer

Volcanic eruptions

Question 18

What is the name of the boundary between the crust and the mantle?

Accepted Answer

Moho

Answer

Gutenberg discontinuity

Answer

Lehmann discontinuity

Question 19

What is the estimated age of the Earth?

Accepted Answer

4.5 billion years

Answer

3.5 billion years

Answer

2.5 billion years

Question 20

Which layer inside the Earth is the hottest?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Answer

Atmosphere

Question 21

What is the outer layer of the Earth called?

Accepted Answer

Crust

Answer

Core

Answer

Mantle

Question 22

Which part of the Earth is very hot and liquid?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 23

Which layer of the Earth is the hottest?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 24

What causes the Earth's plates to move?

Accepted Answer

Hot, moving rock inside the Earth

Answer

The pull of the moon

Answer

The spinning of the Earth

Question 25

What type of rock is formed when melted rock cools and hardens?

Accepted Answer

Igneous rock

Answer

Sedimentary rock

Answer

Metamorphic rock

Question 26

Where is the boundary between the Earth's crust and mantle?

Accepted Answer

The Mohorovičić discontinuity

Answer

The Gutenberg discontinuity

Answer

The Asthenosphere

Question 27

Which layer of the Earth creates the Earth's magnetic field?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 28

The outermost layer of the Earth is the:

Accepted Answer

Crust

Answer

Mantle

Answer

Core

Question 29

The Earth's crust is mainly made up of:

Accepted Answer

Rocks and minerals

Answer

Iron and nickel

Answer

Gases

Question 30

The layer of the Earth responsible for generating its magnetic field is the:

Accepted Answer

Outer Core

Answer

Crust

Answer

Mantle

Question 31

The hottest layer of the Earth is the:

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 32

The movement of tectonic plates is caused by:

Accepted Answer

Convection currents in the mantle

Answer

Rotation of the Earth

Answer

Gravity

Question 33

The boundary where two tectonic plates pull away from each other is called a:

Accepted Answer

Divergent boundary

Answer

Convergent boundary

Answer

Transform boundary

Question 34

The type of seismic wave that travels through the Earth the fastest is:

Accepted Answer

P-waves

Answer

S-waves

Answer

Surface waves

Question 35

The Earth's crust is about:

Accepted Answer

5-50 km thick

Answer

100-200 km thick

Answer

1000-2000 km thick

Question 36

What is the outermost layer of our planet?

Accepted Answer

Crust

Answer

Mantle

Answer

Core

Question 37

What is the boundary called that separates the crust and the mantle?

Accepted Answer

Mohorovičić discontinuity

Answer

Gutenberg discontinuity

Answer

Conrad discontinuity

Question 38

How does the density of the Earth's layers change from the crust to the core?

Accepted Answer

The density increases as you go deeper.

Answer

The density decreases as you go deeper.

Answer

The density stays the same throughout the layers.

Question 39

Which layer of the Earth is the thickest?

Accepted Answer

Mantle

Answer

Crust

Answer

Core

Question 40

Which part of the Earth's structure is responsible for the Earth's magnetic field?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 41

What is the name of the instrument used to measure the thickness of the Earth's layers?

Accepted Answer

Seismometer

Answer

Barometer

Answer

Thermometer

Question 42

Which layer of the Earth is the most dense?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 43

Which layer of the Earth is very hot and dense, and is also in the centre of the planet?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 44

Which type of rock is mostly found in the Earth's crust and is formed by the settling and sticking together of bits of plants and animals?

Accepted Answer

Sedimentary

Answer

Igneous

Answer

Metamorphic

Question 45

Which layer of the Earth is responsible for the movement of the plates on the Earth's surface?

Accepted Answer

Mantle

Answer

Crust

Answer

Core

Question 46

Which of the following is a feature of the Earth's crust?

Accepted Answer

Thin and solid

Answer

Thick and dense

Answer

Liquid and hot

Question 47

What is the name of the boundary between the Earth's crust and mantle?

Accepted Answer

Mohorovičić discontinuity

Answer

Gutenberg discontinuity

Answer

Wiechert-Gutenberg discontinuity

Question 48

Which type of rock is formed when magma cools and hardens?

Accepted Answer

Igneous

Answer

Sedimentary

Answer

Metamorphic

Question 49

What is the main cause of earthquakes?

Accepted Answer

The movement of the Earth's plates

Answer

Volcanic eruptions

Answer

Explosions deep in the ground

Question 50

Which layer of the Earth is at the center?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 51

What is the main material that makes up the Earth's crust?

Accepted Answer

Rock

Answer

Iron

Answer

Water

Question 52

Which part of the Earth is the warmest?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 53

How thick is the Earth's crust?

Accepted Answer

About 50 kilometers

Answer

About 1,000 kilometers

Answer

About 5,000 kilometers

Question 54

Which of these is NOT a layer of the Earth?

Accepted Answer

Air around the Earth

Answer

Crust

Answer

Mantle

Question 55

What is the main type of rock in the Earth's core?

Accepted Answer

Iron

Answer

Basalt

Answer

Granite

Question 56

What is the name of the boundary between the Earth's crust and mantle?

Accepted Answer

Moho

Answer

Asthenosphere

Answer

Lithosphere