Climate change

What is the natural greenhouse effect?

• When human actions cause a change in levels of greenhouse gases in the atmosphere

• A warming of the Earth caused by gases that occur naturally in the atmosphere

• The effect of sunspots on the Earths climate

What are the main greenhouse gases? Select THREE correct answers.

• Carbon dioxide

• Methane

• Nitrous oxide

• Oxygen

What is deforestation?

• The planting of trees

• The rebuilding of forests

• When people visit a forest

• The cutting down of trees

How does deforestation cause global warming?

• It releases stores of carbon dioxide

• It captures and stores carbon dioxide

• It is causes the extinction of many animals and plants

• It releases stores of methane

One human cause of climate change is an increase in the number of cows. What greenhouse gas do cows release?

• Nitrous oxide

• Oxygen

• Methane

• Sulphur dioxide

Burning fossil fuels for electricity releases which greenhouse gas?

• Carbon

• Oxygen

• Methane

• Carbon dioxide

What is solar radiation?

• Energy given off by the Sun

• Energy given off by the burning of fossil fuels

• Energy absorbed by the Sun

• Energy given off by the domestication of cows

The Earth is warmer during...

• an ellipitcal orbit

• a circular orbit

Why do more sunspots make Earth warmer?

Which of the following are effects of climate change? Select THREE correct answers.

• sea level rise

• more sea ice and glaciers

• increase in extreme weather

• coral reefs will bleach and die

• oceans will cool down