1) Where does the most air pollution come from a) humans burning fossil fuels b) humans making bond fires c) humans not picking up after their dogs d) humans BBQing on the weekends 2) If there is less mass in the air, the air is........ a) more dense b) equal density c) less dense d) heavy 3) If there is more mass in the air, the air is........ a) less dense b) equal density c) more dense  d) heavy 4) Which instrument used to measure air pressure contains a liquid inside a glass tube? a) Aneroid Barometer b) Mercury Barometer c) Thermometer d) guitar 5) Which instrument used to measure air pressure contains a needle inside a metal chamber? a) Guitar b) Aneroid Barometer c) Thermometer d) Mercury Barometer 6) Why is earth's atmosphere important for living things? a) it contains oxygen and other gas living things need to survive b) it traps energy from the sun to keep Earth warm AND allows water to exist as a liquid c) it protects living things from dangerous radiation d) it prevents earth from getting hit by meteoroids e) all of the above

Science 6-atmosphere

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