Greenhouse gases and effects

Question 1

What is the earth surrounded by?

Answer 1

A layer of gases, known as the atmosphere.

Question 2

How does the earth heat up?

Answer 2

• Light from the sun enters through the atmosphere and hits the surface of the earth.
• Some of this energy is reflected away from the earth as infa-red or heat waves.
• Some of the gases in the atmosphere are able to trap the heat, so it doesn’t escape into space, known as the greenhouse effect.

Question 3

Is the Greenhouse effect a bad thing?

Answer 3

No, without it the earth would be far too cold to maintain life, however there are too many in the atmosphere.

Question 4

Name some greenhouse gases?

Answer 4

Water vapour, carbon dioxide and methane.

Question 5

What is the increased greenhouse effect?

Answer 5

Temperatures are rising due to more heat being trapped, known as global warming.

Question 6

What causes greenhouse gases being trapped in the

atmosphere?

Answer 6

• Human activity.
• Burning vast quantities of fossil fuels e.g. oil and coal release carbon dioxide and water vapour into the atmosphere.
• Cutting down forests at a huge rate without replacing them.
• Methane:released from landfill sights and cows
• Vehicle engines.
• CFC’S : gases and aerosol cans.