1) There are gases in the _____________ that act like a greenhouse. a) atmosphere b) lungs c) classroom d) space e) sea 2) Green house gases help reflect ______________ back to the Earth, warming it up. a) infrared radiation b) light c) heat d) wind e) air 3) Gases that reflect Infrared radiation back to Earth are called __________________. a) greenhouse gases b) global warming c) greenhouse effect d) methane e) flatulence 4) Greenhouse gases include methane and ____________________. a) carbon dioxide b) Oxides of Nitrogen c) carbon monoxide d) limewater e) oxygen f) methane 5) Global warming is........ a) summer time b) when you heat a globe up c) the gradual increase in the Earth temperature over time. d) when you put light a fire 6) Climate change can be caused by..... a) humans and natural sources b) humans only c) nature only d) neither humans or natural e) aliens 7) deforestation is...... a) cutting down lots of forests b) burning fossil fuels c) factories d) planting trees 8) human causes of climate change are a) volcanic activity b) forest fires c) wild animals d) rearing cattle e) cars f) power stations 9) natural causes of climate change are a) volcanic activity b) forest fires c) wild animals d) deforestation e) factories f) power stations 10) the carbon cycle is.... a) the cycle of how carbon is used and taken from the atmosphere b) a bike made of carbon c) describes how carbon is added to the atmosphere

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