Unit 8 REVIEW

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere
• lower levels of nitrogen in the atmosphere
• higher levels of carbon dioxide in the atmosphere
• higher levels of oxygen in the atmosphere

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 have been linked to climate change?  

• droughts
• flooding
• melting of polar ice caps
• all of the above

The main human activity that releases greenhouse gases is

• using bottled water
• burning fossil fuels
• texting on cellphones
• eating meat

Some greenhouse gases are naturally present in the Earth's atmosphere

• True
• False

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

• deforestation
• photosynthesis
• oceans
• all of the above

Things you can do to help decrease global warming include:

• Eat more ice cream.
• Keep your freezer door open.
• Keep your air conditioner on high.
• Turn off your lights when you’re not using them.

Melting of glaciers and polar ice caps....

• will result in cooler temperatures in the Arctic
• will result in sea-levels rising
• Will have no effect on ecosystems
• None of the above

What is the definition of weather?

• a period of abnormally dry weather that lasts at least 2 years
• the specific condition of the atmosphere at a particular place and time
• a complex community of organisms and the community's environment
• a release of toxic gas

What is the average weather for a particular time and region called?

• drought
• weather
• emissions
• climate