KS3 Science The Earth

What is the order of the Earth structure?

• Inner core, outer core, mantle, crust

• Outer core, inner core, mantle, crust

• Mantle, inner core, outer core, crust

• Crust, inner core, outer core, mantle

What % of oxygen is in the atmosphere?

• 78

• 1

• 21

• 0.03

What % of nitrogen is in the atmosphere?

• 78

• 1

• 21

• 0.03

What % of carbon dioxide is in the atmosphere?

• 78

• 1

• 21

• 0.03

What % of other gases is in the atmosphere?

• 78

• 1

• 21

• 0.03

What process carried out by plants causes carbon dioxide in the atmosphere to go down?

• Respiration

• Eating

• Photosynthesis

• Decomposition

What process carried out by animals and plants causes carbon dioxide in the atmosphere to go up?

• Respiration

• Eating

• Photosynthesis

• Decomposition

What process carried out by animals causes carbon to move from plants to animals?

• Respiration

• Eating

• Photosynthesis

• Decomposition

What process carried out by bacteria and fungi causes carbon dioxide in the atmosphere to go up?

• Respiration

• Eating

• Photosynthesis

• Decomposition

Give an example of a sedimentary rock.

• Limestone

• Granite

• Marble