Greenhouse Gases & the Greenhouse Effect

The greenhouse effect is about

• warming the atmosphere because of increased CO₂ levels

• warming the atmosphere because of decreased CO_{2 }levels

• cooing the atmosphere because of increased CO_{2 }levels

• cooling the atmosphere because of decreased CO_{2 }levels

The greenhouse effect is caused by

• more heat arriving at the Earth from the sun

• the Earth releasing more heat at night

• gases in the air trapping heat released by the Earth

Which of the gases is NOT a greenhouse gas?

• water vapour

• carbon monoxide

• carbon dioxide

• methane

The area of human activity responsible for the highest greenhouse gas emissions is

• energy supply

• transport

• agriculture

• industrial

 Increased carbon dioxide may cause global warming by

• reducing the amount of oxygen in the air.

• allowing more sunlight into the atmosphere.

• trapping more heat in the atmosphere.

• reflecting more sunlight from clouds.

Which of the following is NOT a consequence of burning fossil fuels?

• Extra carbon dioxide is added to the atmosphere.
• The Earth's average global temperature increases.
• Polar ice melts and causes sea levels to rise.
• More infrared radiation escapes out into space.

Which one is a renewable energy source? (clean energy that will not run out / be used up)

• Oil

• Wind

• Coal

• Natural Gas

The graph shows greenhouse gas (GHG) emission sources
(where they come from)

Which natural source emits the most greenhouse gases?

• Ocean

• Forest Fires

• Volcanoes

• Human activities

The graph shows greenhouse gas (GHG) emission sources
(where they come from)

Which emits more greenhouse gases, natural sources or human activities?

• Natural Sources

• Human Activities

Lots of greenhouse gases are emitted by nature.

Why are human activities a problem?

• They help absorb just enough heat and radiation to make it easy to live

• Human emissions add to natural emissions, trapping more heat and resulting in global warming because there are too many greenhouse gases in the atmosphere