© NTScience.co.uk 2005KS3 Unit 9h – Using Chemistry1 Using Chemistry.

KS3 Unit 9h – Using Chemistry 1© NTScience.co.uk 2005

Using Chemistry

KS3 Unit 9h – Using Chemistry 2© NTScience.co.uk 2005

Q1. Name the process where new chemical products form from chemical reactants.

KS3 Unit 9h – Using Chemistry 3© NTScience.co.uk 2005

A1. Reaction

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Q2. Give another word for burning something in

air.

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A2. Combustion

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Q3. What do we call a rapid expansion of hot gases as a chemical reaction takes place.

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A3. Explosion

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Q4. What do we call a chemical reaction with

oxygen.

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A4. Oxidation

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Q5. What do we call the process where we

produce palatable food by application of heat.

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A5. Cooking

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Q6. What do you call the unwanted reaction

between a metal and the atmosphere or water.

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A6. Corrosion

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Q7. What do we call a very long molecule

formed from a string of identical chemical

building blocks? Often a type of plastic.

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A7. Polymer

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Q8. What is a chemical building block used to form plastics called?

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A8. A monomer

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Q9. Name the process of breaking long chain

hydrocarbon molecules into more useful short

chain molecules.

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A9. Cracking

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Q10. What is the general name for a polymer like

polythene, polypropylene, nylon

and polystyrene.

KS3 Unit 9h – Using Chemistry 21© NTScience.co.uk 2005

A10. Plastic

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Q11. Name a fossil fuel raw material used to make most plastics.

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A11. Oil

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Q12. What is a portion of crude oil with a particular

boiling point called?

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A12. A fraction

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Q13. What is the technique used to

separate liquids with different boiling points

called?

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A13. Distillation

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Q14. Name the fossil fuel used in jet aircraft, also called kerosene.

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A14. Paraffin

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Q15. What do we call a substance that increases

the rate of a chemical reaction but that is not

used up itself.

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A15. A catalyst

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Q16. What do we call an atom with an excess positive or negative

electric charge.

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A16. An ion

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Q17. What do we call a negative ion that travels

towards the positive anode?

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A17. An anion

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Q18. What do we call a positive ion that travels towards the negative

cathode.

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A18. A cation

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Q19. What do we call a tiny particle, much lighter

than an atom, that carries a negative electric charge?

KS3 Unit 9h – Using Chemistry 39© NTScience.co.uk 2005

A19. An electron

KS3 Unit 9h – Using Chemistry 40© NTScience.co.uk 2005

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