Climate Changes

Global warming is known as the gradual increase in _________________ of the atmosphere.

• precipitation

• sun spots

• temperature

• ocean currents

The most abundant greenhouse gas in the atmosphere is ___________________.

• oxygen

• nitrogen

• carbon dioxide

• argon

Increased carbon dioxide may cause global warming by trapping more ____________ in the atmosphere.

• water
• gases
• heat
• water vapor

The conditions in an area over a long period of time?

• Climate
• Weather

Any amount of CO₂ (Carbon Dioxide) in the atmosphere is bad for our planet.

• True
• False

Which human activity contributes the MOST carbon dioxide to the atmosphere?

• Fishing
• Breathing
• Burning Fossil Fuels
• Farming

Melting land ice...

• causes sea levels to rise because it adds water to the ocean.

• does not cause sea levels to rise because the water fills the space left by the melted sea ice.

Which of the following is the best conclusion that can be made from this graph?

• atmospheric carbon dioxide levels have been decreasing since 1960
• Hawaii has a lot of carbon dioxide
• humans have been working hard to decrease carbon dioxide levels
• atmospheric carbon dioxide levels have increased steadily since 1960

Which of the following is contributing to an INCREASE in carbon dioxide in the atmosphere?

• deforestation

• photosynthesis

• oceans

• all of the above

• the loss of animal species

Which of the following is NOT a natural air pollutant?

• Debris from forest fires

• Gases escaping volcanoes

• Burning fossil fuels

• Dust blown by the wind