C1- air quality
- Created by: willbrewin1
- Created on: 18-04-15 10:23
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- C1- Air quality
- evolution of the atmposphere
- phase 1- earth's surface molten, cooled down and crust formed, volcanos gave out nitrogen and CO2, oceans formed from cooling water vapour
- phase 2- green plants, CO2 dependant, when died carbon was locked in- fossil fuels
- nitrogen and oxygen levels are constant but CO2 and pollutants fluctuate- humans
- phase 3- complex organisms developed as O2 rose, some CO2 animals died out.
- 21% oxygen, 78% nitrogen, 1% argon and minimal other gases like CO2 and water vapour
- human activity- pollutants
- mainly from combustion
- carbon dioxide- climate change
- carbon monoxide- oxygen in blood decreases- death or injury
- sulfur dioxide- acid rain
- chemical reactions- rearranging atoms in reactants to get different products
- products and reactants often have different properties
- atoms- tiny particles. Molecules- groups of atoms
- hydrocarbons- a molecule containing only hydrogen and carbon
- coal is impure and so is not a hydrocarbon, although it is mainly carbon
- carbon dioxide
- photosynse-this removes it from the air
- enhanced greenhouse effect- global warming
- combustion and respiration produce it
- combustion- type of chemical reaction, when hydrocarbons burn they react with O2, this is an oxidation reaction
- carbon monoxide
- CO- when breathed in not a lot of oxygen so body cant function
- produced when not a lot of oxygen in combustion- incomplete burning
- carbon particulates
- bits of carbon that float around
- causes problems when inhaled
- sulfur pollution
- sulfur and oxygen- sulfur dioxide, ends up in atmosphere, reacts with water making surfuric acud
- erodes soft rock, lakes become acidic, killing wildlife
- sulfur and oxygen- sulfur dioxide, ends up in atmosphere, reacts with water making surfuric acud
- nitrogen di/oxide
- NO- formed in hot places with minimal oxygen- into atmosphere
- make nitric acid (acid rain)
- NO2- formed in hot, oxygen rich environments
- make nitric acid (acid rain)
- NO- formed in hot places with minimal oxygen- into atmosphere
- reducing pollution
- human change- bike, solar etc
- fuel purity increase- less SO2 pollution
- tech- hybrid, electric, biofuel etc in cars
- catalytic converters- turns harmful molecules into unharmful ones
- in most cars
- evolution of the atmposphere
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