Greenhouse Effect and Climate Change

Which of the following are greenhouse gases?

• Carbon Dioxide

• Methane

• Both of these

What do greenhouse gases do?

• Reflect the sun's energy

• Block the sun's infrared radiation

• Act as a thermal blanket for the Earth, absorbing heat and warming the surface

• They help light up the moon at night

What happens to the light energy from the sun when it hits the Earth's surface?

• It is absorbed

• It is reflected back to space

• It is trapped by greenhouse gases in the Earth's atmosphere

If we didn't have the 'greenhouse effect' at all, Earth would

• have volcanoes erupting everywhere

• Cool to a point where we could not live here

• Catch on fire

• blow up from being hit by meteors

The greenhouse effect is a natural process

• true

• false

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

The graph shows us that

• the earth temperature is always increasing

• the earth's temperature has steadily increased since 1900

• the earth's temperature has steadily rising since the 1960s

• the earth's temperature decreased during the 19th and 20th centuries

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

• energy supply

• transport

• agriculture

• industrial

 Which of the following activities contributes the most to carbon emissions globally?

• Deforestation
• Agriculture
• Burning fossil fuels
• Respiration

Which of the following are greenhouse gases?

• Carbon dioxide
• Methane
• Water vapor