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D - Science - Unit 6
The Air Around You - Part 2
Question | Answer |
---|---|
What is the importance of earth's atmosphere? | it makes conditions on earth suitable for living things |
What sources of pollution release a great deal of smoke and dust into the air? | forest fires, soil erosion, and dust storms |
How do erupting volcanoes cause pollution? | they spew out clouds of dust and ash, along with poisonous gases |
What is most air pollution the result of? | burning fossil fuels, such as coal, oil, gasoline, and diesel fuel |
Almost half of fossil fuel air pollution comes from what sources? | cars & other motor vehicles |
What type of pollutants do fossil fuels produce? | carbon monoxide, nitrogen oxides, and sulfur oxides |
What 2 things are caused by burning fossil fuels? | smog & acid rain |
How is photochemical smog formed? | formed by the action of sunlight on pollutants, such as hydrocarbons and nitrogen oxides |
How does acid rain form? | forms when nitrogen oxides and sulfur oxides combine with water in the air to form nitric acid and sulfuric acid |
Who monitors air pollutants in the US? | Environmental Protection Agency |
What is something that people can do to help reduce pollution? | use more public transportation instead of driving a car |
Why are the small percentage of the remaining gases in dry air called trace gases? | because only small amounts of them are present |
Besides oxygen, what 2 things do all living things need to survive? | warmth & liquid water |
What does the atmosphere protect living things from? | the sun's ultraviolet radiation |
What does the atmosphere prevent from hitting the earth? | meteroids |
What is water vapors important role in earth's weather? | to make clouds |