KS3 Unit 7f – Chemical Reactions 1© NTScience.co.uk 2005

Chemical Reactions

KS3 Unit 7f – Chemical Reactions 2© NTScience.co.uk 2005

Q1. What gas do we need to breathe

(respire)?

KS3 Unit 7f – Chemical Reactions 3© NTScience.co.uk 2005

A1. Oxygen

KS3 Unit 7f – Chemical Reactions 4© NTScience.co.uk 2005

Q2. What gas is the fuel in a Bunsen burner?

KS3 Unit 7f – Chemical Reactions 5© NTScience.co.uk 2005

A2. Methane

KS3 Unit 7f – Chemical Reactions 6© NTScience.co.uk 2005

Q3. What element in milk gives us strong teeth and bones?

KS3 Unit 7f – Chemical Reactions 7© NTScience.co.uk 2005

A3. Calcium

KS3 Unit 7f – Chemical Reactions 8© NTScience.co.uk 2005

Q4. What is the scientific term for an upset

stomach?

KS3 Unit 7f – Chemical Reactions 9© NTScience.co.uk 2005

A4. Indigestion

KS3 Unit 7f – Chemical Reactions 10© NTScience.co.uk 2005

Q5. What do you call a chemical reaction

between a substance and oxygen that gives

out heat?

KS3 Unit 7f – Chemical Reactions 11© NTScience.co.uk 2005

A5. Burning or

Combustion

KS3 Unit 7f – Chemical Reactions 12© NTScience.co.uk 2005

Q6. What do you call the starting substances

before a chemical reaction takes place?

KS3 Unit 7f – Chemical Reactions 13© NTScience.co.uk 2005

A6. Reactants

KS3 Unit 7f – Chemical Reactions 14© NTScience.co.uk 2005

Q7. What do you call the substances formed in a chemical reaction?

KS3 Unit 7f – Chemical Reactions 15© NTScience.co.uk 2005

A7. Products

KS3 Unit 7f – Chemical Reactions 16© NTScience.co.uk 2005

Q8. What element is present in all organic

compounds?

KS3 Unit 7f – Chemical Reactions 17© NTScience.co.uk 2005

A8. Carbon

KS3 Unit 7f – Chemical Reactions 18© NTScience.co.uk 2005

Q9. Name a hard form of limestone that is used to

make statues?

KS3 Unit 7f – Chemical Reactions 19© NTScience.co.uk 2005

A9. Marble

KS3 Unit 7f – Chemical Reactions 20© NTScience.co.uk 2005

Q10. Oil, gas and coal are all what??

KS3 Unit 7f – Chemical Reactions 21© NTScience.co.uk 2005

A10. Fossil fuels

KS3 Unit 7f – Chemical Reactions 22© NTScience.co.uk 2005

Q11. What environmental damage is caused by burning

fuels that contain sulphur?

KS3 Unit 7f – Chemical Reactions 23© NTScience.co.uk 2005

A11. Acid rain

KS3 Unit 7f – Chemical Reactions 24© NTScience.co.uk 2005

Q12. What do you call compounds that contain

a metal, carbon and oxygen only?

KS3 Unit 7f – Chemical Reactions 25© NTScience.co.uk 2005

A12. Carbonates

KS3 Unit 7f – Chemical Reactions 26© NTScience.co.uk 2005

Q13. What do you call a reaction that is very

difficult to take back the other way?

KS3 Unit 7f – Chemical Reactions 27© NTScience.co.uk 2005

A13. Irreversible

KS3 Unit 7f – Chemical Reactions 28© NTScience.co.uk 2005

Q14. Which metallic element is used to

galvanise steel to reduce corrosion?

KS3 Unit 7f – Chemical Reactions 29© NTScience.co.uk 2005

A14. Zinc

KS3 Unit 7f – Chemical Reactions 30© NTScience.co.uk 2005

Q15. What do you call medium sized solid

lumps of a substance?

KS3 Unit 7f – Chemical Reactions 31© NTScience.co.uk 2005

A15. Granules

KS3 Unit 7f – Chemical Reactions 32© NTScience.co.uk 2005

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