What is climate change?
			A: a sudden change in conditions including temperature and precipitation B: a change in global temperatures and weather patterns over many years C: an extreme weather event such as a hurricane or drought
		An unexpected thunderstorm is an example of:
			A: weather B: climate C: climate change
		What does the atmosphere contain that keeps Earth's surface warm?
			A: water vapor and carbon dioxide B: methane and nitrous oxide C: all of the above
		What is one way that scientists measure global climate?
			A: they collect weather data from places with tropical climates B: they collect weather data from places with extreme climates C: they collect and average data from weather stations around the world
		Where do scientists find evidence that Earth's climate has changed in the past?
			A: tree rings B: glacial ice C: both of these
		Which human actions are causing Earth's climate to warm?
			A: building "green" houses that use less energy B: burning fossil fuels that release greenhouse gases C: using solar power that relies on energy from the Sun
		How does climate change affect people?
			A: rising sea levels can flood coastal homes and communities B: hotter, longer droughts can threaten crops C: both of these and more
		What is the advantage of "clean" energy sources like wind and solar?
			A: they produce few or no greenhouse gases B: they are always less expensive than fossil fuels C: they rely on non-renewable resources
		What is the best way to reduce the effects of climate change?
			A: conserve energy by using less electricity and fuel B: switch to "clean" energy sources C: combine many efforts like these on a worldwide scale
		Which of the following actions can you do to help lessen climate change?
			A: walk instead of drive B: buy less stuff C: both of these and more