Global warming

The main human activity that releases greenhouse gases is

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

The greenhouse gas having the greatest role in human-caused global warming is

• methane
• carbon dioxide
• CFCs (chlorofluorocarbons)
• ozone

Why is the increase of Greenhouse gases a big issue?

• It causes climate change and increase in the global temerature

• It can lead to a major increase in Greenhouses

• It leads to more factories

• It causes a major decrease in people

The gradual increase in the temperature of the atmosphere is known as ________________.

• Greenhouse Effect
• Global Warming
• Carbon Dioxide Gases
• Methane

How can global warming cause sea levels to rise? Choose the best answer.

• by causing it to rain more often
• by melting glaciers and ice caps
• by increasing the number of undersea volcanic eruptions
• by creating bigger and more powerful hurricanes

Why does cutting down trees increase global warming?

• trees soak up carbon dioxide
• trees provide shade which counteracts global warming
• trees absorbs the sun's energy without radiating back into the atmosphere
• trees drain greenhouse gases like methane from soil

What happens to the temperature if more greenhouse gases are released into the atmosphere?

• Temperature goes up
• Temperature goes down

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.

The graph below shows CO_2 emissions and temperatures from 1909 to 1949. What conclusion is best supported by the graph?

• There is no relationship between carbon dioxide concentrations and temperatures

• As carbon dioxide concentrations increase, temperatures increase

• As carbon dioxide concentrations increase, temperatures decrease

• As carbon dioxide concentrations decrease, temperatures increase

Everyone should try to reduce their ...

• carbon footprint

• solar footprint

• pylon footprint

• global footprint

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