Air Quality

Two or more atoms chemically bonded.
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The layer of gases surrounding the world.
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Two or more elements or compounds which are nowt chemically bonded.
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tiny amounts of solids
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The change of state from gas to liquid.
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The chemical reaction which occurs in plants where carbondioxide react with water to form glucose and oxygen in the presence of sunlight.
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A chemical that contaminates air,water or soil
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Something given out by something else for example the emision of carbon dioixde from combustion engines
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The quantity of the chemical dissolved in a stated volumes of solution. Conc can be measure in grams per litre
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How close a quantative result is to the true or actual value.
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A measured result from the expected trend. CAn often be due to human error.
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Mean value
A type of average found by adding up a set of measurements and then dividing by the number of measurements. This gives you more confidence than a single result.
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Best estimate
When measuring a variable the value of which you have the most confindence
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The difference between the highest and the lowest of a set of measurments.
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Real difference
When the ranges of two sets of data do not overlap.
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Chemical reaction
When a new product is formed. Chemical bonds hve been formed.
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The smallest particle of and element
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A chemical containing only the lements hydrogen and carbon.
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The new chemical formed after a chemical reaction has occurred.
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chemical formula
A way of describing a chemical which uses symbols for atoms it gives information about the number of atoms.
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Word Equation
a summary of the chemical involved in a reaction
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Chemical Equation
A summary of all the chemical in the equation with their physical states.
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conservation of atoms
All the atoms present at the beginning of a reaction are still present at the end but they are rearranged. No new atoms are created or destroyed.
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Conservation of mass
The total mass of a reaction is the same at the end as it is in the beginning.
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The physical or chemical characteristics of a chemical.
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The link between two things. For example when the pollen count increases the number of cases of hay fever increases too.
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When there is evidence that changes in a factor produces a particular outcome, then factor is said to cause the outcome.
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A variable that changes and may affect something else.
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A variable that changes as a result of something else.
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The percentage of energy supplied that is useful.
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Catalytic converter
A device fitted to a vehicle exhaust that changes waste gases into less harmful ones.
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A reaction where oxygen is removed from a chemical
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A rule that can be enforced bu an authority such as Government
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Wet Scrubbing
A process used to remove pollutants from flue (waste)gases in powerstation
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Other cards in this set

Card 2


The layer of gases surrounding the world.



Card 3


Two or more elements or compounds which are nowt chemically bonded.


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Card 4


tiny amounts of solids


Preview of the back of card 4

Card 5


The change of state from gas to liquid.


Preview of the back of card 5
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