1. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 1 Compounds and Mixtures

2. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 2 Q1. What is the smallest particle of an element called?

3. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 3 A1. An atom

4. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 4 Q2. What contains only one type of atom and is found on the periodic table?

5. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 5 A2. An element

6. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 6 Q3. What contains two or more elements chemically combined?

7. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 7 A3. A compound

8. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 8 Q4. What contains two or more chemicals together which are not chemically combined?

9. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 9 A4. A mixture

10. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 10 Q5. Give a word that means containing only one substance.

11. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 11 A5. Pure

12. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 12 Q6. What chemicals have a pH less than 7 and turn blue litmus paper red?

13. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 13 A6. Acids

14. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 14 Q7. What type of acid that is found in the stomach?

15. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 15 A7. Hydrochloric acid

16. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 16 Q8. Name a reactive alkali metal that is used in yellow street lights.

17. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 17 A8. Sodium

18. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 18 Q9. Which type of reaction is very difficult to take in the other direction?

19. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 19 A9. An irreversible reaction

20. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 20 Q10. What word means to change state from liquid to gas?

21. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 21 A10. Boil

22. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 22 Q11. What word means to change state from liquid to solid?

23. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 23 A11. Freeze

24. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 24 Q12. What word means to change state from solid to liquid?

25. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 25 A12. Melt

26. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 26 Q13. What word means to change state from gas to liquid?

27. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 27 A13. Condense

28. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 28 Q14. What is a measure of the average thermal energy per molecule in a substance?

29. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 29 A14. Temperature

30. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 30 Q15. What do we call a chemical that contains a metal, carbon and oxygen only?

31. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 31 A15. A carbonate

32. © NTScience.co.uk 2005KS3 Unit 8f – Compounds and mixtures 32 Well Done! Now check your score