1) What percentage of Nitrogen is found in the air? a) 87% b) 20% c) 78% d) 21% 2) Which gas is found in the air at a percentag of 21% a) Hydrogen b) Carbon Dioxide c) Oxygen d) Nitrogen 3) What is the BEST definition for an atom? a) A small circle b) The smallest particle which elements are made up of c) Tiny particles which things are made of 4) What is a molecule? a) Two or more atoms joined together? b) Two or more different atoms joined together? c) Two or more compounds joined together 5) What is a compound? a) Two or more atoms joined together b) Two or more different atoms joined together c) Three or more different atoms joined together 6) What do we call a result which is very different from other repeated measurements? a) Lieouter b) Outlier c) Out lier d) Outlie 7) What is the name of the pollutant made up of tiny bits of solid carbon suspended in the ? a) Particles b) Particulars c) Particulates d) Particulations 8) What problems are associated with carbon monoxide? a) It is poisonous b) It makes buildings dirty c) It causes acid rain d) It causes breathing problems 9) What problems are associated with Sulphur dioxide? a) It is poisonous b) It can cause acid rain c) It makes buildings dirty d) It causes breathing problems 10) How many oxygen atoms is sulphur dioxide made up of? a) 4 b) 3 c) 2 d) 1 e) 0 11) Which of these is an outlier: 19.4, 19.3, 19.2, 19.1, 19.0, 18.9. 18.8, 18.3 a) 19.4 b) 15.0 c) 18.3 d) None of the above 12) Which of these is an outlier: 17.1, 17.0, 16.8, 16.7, 16.6 a) 17.1 b) 15.4 c) 16.6 d) None of the above 13) What is the best estimate the same as? a) The mode b) The median c) The mean 14) What comes out of a coal power station? a) Oxyen only b) Carbon dioxide only c) Carbon dioxide and water 15) What comes out of a gas power station? a) Carbon dioxide only b) Oxygen only c) Carbon dioxide and water 16) Which two gases react in a car engine? a) Nitrogen and oxygen b) Oxygen and hydrogen c) Hydrogen and nitrogen d) Carbon dioxide and oxygen 17) What do we call a compound made up of oxygen and hydrogen? a) Carbohydrate b) Hydrocarbonate c) Hydrocarbon d) Carbohydron 18) Water is not put into a car engine, but it comes out of the exhaust. Where does this water come from? a) The place where water is stored to clean the windscreen b) The reaction between oxygen from the air and hydrogen from the fuel (hydrocarbons) c) The reaction between nitrogen from the air and hydrogen from the fuel (hydrocarbon) 19) What is combustion? a) The process of burning b) The process of burning wood c) The process of respiration 20) How thick is the atmosphere? a) 15 m b) 15 km c) 15 miles d) 15000 km 21) If a person lived in the middle of the countryside with no roads or factories nearby, would they breathe in any pollutants? a) No b) Yes

c1 quiz

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