Yr8 Earth 2

What is the atmosphere made up of?

• A mixture of gases

• A mixture of liquids

• A mixture of solids

• A mixture of metals

What are greenhouse gases?

• Gases that absorb and trap radiation

• Gases that cool the Earth

• Gases that reflect all radiation back into space

• Gases that are only found in greenhouses

Which gases are commonly known as greenhouse gases?

• Carbon dioxide and methane

• Oxygen and nitrogen

• Helium and hydrogen

• Argon and neon

What is global warming?

• The gradual decrease in temperature of the Earth

• The gradual increase in temperature of the Earth

• The sudden increase in temperature of the Earth

• The sudden decrease in temperature of the Earth

What is the carbon cycle?

• The process by which carbon is naturally transferred to different stores

• The process by which carbon is artificially created

• The process by which carbon is destroyed

• The process by which carbon is converted to oxygen

How is carbon released into the atmosphere?

• Through combustion of fossil fuels and animal respiration

• Through photosynthesis

• Through the melting of ice caps

• Through the formation of rocks

What is a natural resource?

• A resource that is naturally occurring

• A resource that is man-made

• A resource that is only found in laboratories

• A resource that is only found in space

What is an ore?

• A naturally occurring rock with enough metal to be worth extracting

• A man-made rock with enough metal to be worth extracting

• A naturally occurring rock with no metal

• A man-made rock with no metal

What is an example of an ore?

• Bauxite

• Granite

• Limestone

• Sandstone

What is recycling?

• The collecting and processing of materials that have been used

• The collecting and processing of new materials

• The collecting and processing of waste materials

• The collecting and processing of food materials