The Earth's Structure

Question 1

How many layers does the earth have

Answer 1

3

Question 2

Name the three layers

Answer 2

Crust
Mantle
Core. (Split into two)

Question 3

Which layer is split into two layers. What are they called

Answer 3

The core
Inner core- centre of earth
Outer core-layer above the centre

Question 4

Describe properties of crust

Answer 4

Outer most layer

Made up of solid rock

Question 5

Describe layers of mantle

Answer 5

Made up of solid rock but can flow like a liquid
Underneath crust
Magma/lava store here

Question 6

Describe properties of the outer core

Answer 6

Layer that lies outside the inner core

mostly liquid

Question 7

Describe the inner core

Answer 7

Made up of generally iron and nickel

centre of the Earth

Question 8

Define the atmosphere

Answer 8

Many gases are here
this surrounds the Earth
and allows us to live

Question 9

Describe the troposphere

Answer 9

The layer of the atmosphere that is the nearest to the Earth 
Usually contains:
-oxygen 
-nitrogen 
-carbon dioxide 
-and argon

Question 10

What percentage of the atmosphere is nitrogen

Answer 10

78%

Question 11

What percentage of the atmosphere is made up of oxygen

Answer 11

21%

Question 12

What percentage of the atmosphere is made up of argon

Answer 12

1%

Question 13

What percentage of the atmosphere is made up of carbon dioxide and other gases

Answer 13

0.04%

Question 14

What are some of the human activities that impacts the atmosphere

Answer 14

• combustion of fossil fuels(factories)= add co2
• deforestation= limits photosynthesis= leaving lots of co2 in there
• agriculture= cows burp and fart release methane (ghg)

Question 15

What gas does cows release

Answer 15

Methane