1. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions1 Chemical Reactions

2. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions2 Q1. What gas do we need to breathe (respire)?

3. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions3 A1. Oxygen

4. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions4 Q2. What gas is the fuel in a Bunsen burner?

5. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions5 A2. Methane

6. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions6 Q3. What element in milk gives us strong teeth and bones?

7. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions7 A3. Calcium

8. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions8 Q4. What is the scientific term for an upset stomach?

9. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions9 A4. Indigestion

10. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions10 Q5. What do you call a chemical reaction between a substance and oxygen that gives out heat?

11. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions11 A5. Burning or Combustion

12. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions12 Q6. What do you call the starting substances before a chemical reaction takes place?

13. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions13 A6. Reactants

14. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions14 Q7. What do you call the substances formed in a chemical reaction?

15. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions15 A7. Products

16. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions16 Q8. What element is present in all organic compounds?

17. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions17 A8. Carbon

18. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions18 Q9. Name a hard form of limestone that is used to make statues?

19. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions19 A9. Marble

20. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions20 Q10. Oil, gas and coal are all what??

21. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions21 A10. Fossil fuels

22. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions22 Q11. What environmental damage is caused by burning fuels that contain sulphur?

23. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions23 A11. Acid rain

24. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions24 Q12. What do you call compounds that contain a metal, carbon and oxygen only?

25. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions25 A12. Carbonates

26. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions26 Q13. What do you call a reaction that is very difficult to take back the other way?

27. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions27 A13. Irreversible

28. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions28 Q14. Which metallic element is used to galvanise steel to reduce corrosion?

29. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions29 A14. Zinc

30. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions30 Q15. What do you call medium sized solid lumps of a substance?

31. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions31 A15. Granules

32. © NTScience.co.uk 2005KS3 Unit 7f – Chemical Reactions32 Well Done! Now check your score