what gases is the atmosphere made of and what are the percentages?
nitrogen(78%), oxygen(21%) and argon/other(1%)
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how was the atmosphere created?
1)first atmosphere was created by volcanic activity 2) the earth cooled meaning water vapour condensed to create the seas 3)carbon dioxide was removed by plants and dissolved in the seas
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how do you measure air pollutants?
measure the concentrations in different areas and look at indicators
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name the 2 types of indicators and give examples...
non-living (gas levels) and living (lichens and mayfly larvae)
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elements are...
made up of one type of atom
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molecules and compounds are...
molecules=different atoms joined. compounds= different molecules chemically joined
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what happens in a reaction?
reactants - atoms separate and join - products
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what is combustion and what are the 2 types?
when a fuel reacts with oxygen. theres complete (when theres enough oxygen to fully burn the fuel) and incomplete (when theres not enough oxygen)
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what is oxidation?
when an atom gains oxygen
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effects of pollutants...
carbon= makes surfaces dirty, increased carbon dioxide levels and nitrogen/sulfur dioxide= acid rain
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reducing pollution in power stations...
use less electricity, use renewable energy sources and remove toxic chemicals
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reducing car pollution...
low sulfur fuel, legal limits for exhaust, public transport and catalytic converters
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Other cards in this set
Card 2
Front
how was the atmosphere created?
Back
1)first atmosphere was created by volcanic activity 2) the earth cooled meaning water vapour condensed to create the seas 3)carbon dioxide was removed by plants and dissolved in the seas
Card 3
Front
how do you measure air pollutants?
Back
Card 4
Front
name the 2 types of indicators and give examples...
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