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17 Cards in this Set
- Front
- Back
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percntage of nitrogen in atmosphere? |
78 % |
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percentage of oxygen? |
21 % |
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percentage of co2 ? |
0.035 % |
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why did co2 go down? |
absorbed by plants for photosysnthese |
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why did oxgen levels go up? |
let out by plants by photosysthesis |
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how were oceans formed? |
water vapor condensed to become oceans |
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what was early atmonsphere made up of? |
early atmosphere was co2 and water vapour |
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what causes acid rain? |
sulfur dioxide |
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what do catalytic convertors in cars do /? |
reduce amount of carbon monoxide getting into atmonsphere |
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carbon ccycle? |
-respiration, combustion, decay of plants and animals add co2 and remove oxygen -photosysnthsis does oppisite - removes co2 and adds oxygen - this balances everything out |
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what does carbon monoxide cause? |
asthma |
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how human activty affects composition of air? |
-human populatin + -> more people reproducing -> giving out more co2 - more people=more energy needed eg heating,cooking -countries becoming industrilied- more energy demand per person -more people means more burning of fossil fuels- more co2 released |
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another name for acid rain? and what acid rain causes? |
sulfar dioxide causes lakes to be acidic - plants and animals die |
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where does sulfar dioxide come from? |
sulfar dioxide comes from sular impurities in fossil fuels |
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how is acid rain made? |
1) nitrogen oxides are created from a reaction between nitrogen+oxygen in air caused by heat from burning 2) when gases mix with clouds they form dilute sulfaric acid and dilute nitric acid
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what is photochemical smog? |
is type of air pollution caused by sunlight acting on oxides of nitrogen these oxides combine with oxygen in air to produce oxygen - ozone cause breathing difficultes and headaches |
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what does carbon monozide cause? |
can stop your blood from carrinyg oxygen around body lack of oxygen in blood can lead to coma, faining , even death |
