1. How can you test for the presence of starch in food?

3. What are your lungs for?
(note: none of the answers is 'breathing'!)

4. What process would be used to obtain the solute from a solution?

5. The diagram shows how an electromagnet can be made by passing an electric current through a coil of wire wrapped around a soft iron bar (an iron nail will do)

Which of the options below will increase the strengthg of the magnet?(tick all that apply)

 

6. If water is added to anhydrous copper sulphate what would be the colour of the product?

7. If a bar of chocolate is left in the sun what will happen to it?

8. If a cup of tea is to kept warm it needs to be wrapped in what kind of material?

9. Pick the correct sentence from those given to best  describe the term below:

Pitch

10. This diagram shows a measuring cylinder being used to measure the volume of some water.

What volume of water is being measured?

11. What will chocolate do when heated gently in an open dish

12. Burning coal converts chemical energy into what kinds of energy (tick TWO boxes)

13. Our teeth and bones are rich in which mineral?

14. What gas is produced when zinc is added to dilute sulphuric acid?

15. What organ in our body contains valves?

16. Which would be the best substance to neutralize some spilt hydrochloric acid?

17. Which of the following produces a permanent chemical change

18. Where would you find villi in the human body?

19. Substances can be obtained from the ground and purified in a variety of ways.

Which common metal is exctracted by heating its ore to a high temperature with coke (carbon) in a blast furnace.

20. A liquid with a pH of 6 would be described as .....