Earth 8

Which are greenhouse gases?

• Nitrogen

• Oxygen

• Carbon Dioxide

• Methane

Greenhouse gases ...

• store more energy than other gases

• are the most common substances in our atmosphere

• come into our atmosphere from space

• are leaking from Earth's crust

The greenhouse effect is ...

• the presence of harmful or poisonous substances in our environment

• the gradual increase in the air temperature at the surface of the Earth

• long term changes to weather patterns

• heat being trapped in by atmospheric gases

Climate change is ...

• the presence of harmful or poisonous substances in our environment

• the gradual increase in the air temperature at the surface of the Earth

• long term changes to weather patterns

• heat being trapped in by atmospheric gases

Global warming is ...

• the presence of harmful or poisonous substances in our environment

• the gradual increase in the air temperature at the surface of the Earth

• long term changes to weather patterns

• heat being trapped in by atmospheric gases

Select which processes RELEASE carbon into our atmosphere

• Carbon sinks

• Combustion

• Respiration

• Photosynthesis

What is a 'carbon sink'?

• A drop in carbon levels due to renewable energy

• A fossil fuel that releases carbon when burned

• Something that absorbs and stores carbon

• Burying carbon below ground or sea

How could the amount of carbon in the atmosphere be reduced?

• Cut down more trees

• Plant more trees

• Breathe less

• Breathe more

How could the amount of carbon in the atmosphere be reduced?

(choose 2)

• Reduce animal farming

• Use renewable energy

• Use gas instead of coal

• Exercise more

What does this graph show?

• That carbon dioxide has been naturally rising

• That human behaviour has caused an increase in greenhouse gases

• That renewable energy is helping reduce carbon levels

• An indirect correlation between values