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KS3 Unit 7f – Chemical Reactions 1© NTScience.co.uk 2005
Chemical Reactions
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Q1. What gas do we need to breathe
(respire)?
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KS3 Unit 7f – Chemical Reactions 3© NTScience.co.uk 2005
A1. Oxygen
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KS3 Unit 7f – Chemical Reactions 4© NTScience.co.uk 2005
Q2. What gas is the fuel in a Bunsen burner?
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A2. Methane
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KS3 Unit 7f – Chemical Reactions 6© NTScience.co.uk 2005
Q3. What element in milk gives us strong teeth and bones?
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A3. Calcium
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KS3 Unit 7f – Chemical Reactions 8© NTScience.co.uk 2005
Q4. What is the scientific term for an upset
stomach?
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KS3 Unit 7f – Chemical Reactions 9© NTScience.co.uk 2005
A4. Indigestion
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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?
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KS3 Unit 7f – Chemical Reactions 11© NTScience.co.uk 2005
A5. Burning or
Combustion
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KS3 Unit 7f – Chemical Reactions 12© NTScience.co.uk 2005
Q6. What do you call the starting substances
before a chemical reaction takes place?
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KS3 Unit 7f – Chemical Reactions 13© NTScience.co.uk 2005
A6. Reactants
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KS3 Unit 7f – Chemical Reactions 14© NTScience.co.uk 2005
Q7. What do you call the substances formed in a chemical reaction?
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A7. Products
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KS3 Unit 7f – Chemical Reactions 16© NTScience.co.uk 2005
Q8. What element is present in all organic
compounds?
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KS3 Unit 7f – Chemical Reactions 17© NTScience.co.uk 2005
A8. Carbon
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KS3 Unit 7f – Chemical Reactions 18© NTScience.co.uk 2005
Q9. Name a hard form of limestone that is used to
make statues?
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KS3 Unit 7f – Chemical Reactions 19© NTScience.co.uk 2005
A9. Marble
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KS3 Unit 7f – Chemical Reactions 20© NTScience.co.uk 2005
Q10. Oil, gas and coal are all what??
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KS3 Unit 7f – Chemical Reactions 21© NTScience.co.uk 2005
A10. Fossil fuels
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KS3 Unit 7f – Chemical Reactions 22© NTScience.co.uk 2005
Q11. What environmental damage is caused by burning
fuels that contain sulphur?
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KS3 Unit 7f – Chemical Reactions 23© NTScience.co.uk 2005
A11. Acid rain
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KS3 Unit 7f – Chemical Reactions 24© NTScience.co.uk 2005
Q12. What do you call compounds that contain
a metal, carbon and oxygen only?
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KS3 Unit 7f – Chemical Reactions 25© NTScience.co.uk 2005
A12. Carbonates
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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?
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KS3 Unit 7f – Chemical Reactions 27© NTScience.co.uk 2005
A13. Irreversible
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KS3 Unit 7f – Chemical Reactions 28© NTScience.co.uk 2005
Q14. Which metallic element is used to
galvanise steel to reduce corrosion?
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KS3 Unit 7f – Chemical Reactions 29© NTScience.co.uk 2005
A14. Zinc
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KS3 Unit 7f – Chemical Reactions 30© NTScience.co.uk 2005
Q15. What do you call medium sized solid
lumps of a substance?
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KS3 Unit 7f – Chemical Reactions 31© NTScience.co.uk 2005
A15. Granules
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KS3 Unit 7f – Chemical Reactions 32© NTScience.co.uk 2005
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