7g Particles Test 2004

Do not write on this sheet! For questions 1 to 8 chose the correct word from the brackets to make each sentence correct

(hard / transparent/ solid) Steel is used to make spoons because it is (expensive / hard / magnetic) Copper is used for wires because it conducts (heat / electricity / sound) Foam is used in packaging because it is (white / dense / light) Rubber is used in bicycle tyres because it is (hard/ flexible / natural) Plastic is used for washing up bowls because it is (man-made/waterproof) An example of a material that is liquid is (steam / sugar / syrup) When water is a gas it is called (ice / empty space / steam )

1. Glass is used in windows because it is 2. 3. 4. 5. 6. 7. 8.

Look at the diagrams below, which show how water molecules are arranged as a

liquid and as a gas. Then answer questions 9 to 11.

solid, as a

9. Diagram A shows a _______________ 10. Diagram B shows a _____________ 11. Diagram C shows a _______________

For each substance in Question 12-17, state whether it is a solid, liquid or gas. 12. carbon dioxide 13. milk 14. leaves 15. blood 16. sand 17. breath For questions 18 to 24 chose the correct word from the brackets to make each sentence correct 18. 19. 20. 21. 22. 23. 24.

(gas/ liquid/ solid) has a fixed shape and is rigid. A (gas/ liquid/ solid) flows and takes up the shape of its container. A (gas/ liquid/ solid) spreads out to occupy all the space available. A (gas/ liquid/ solid) has a fixed volume and a fixed shape A (gas/ liquid/ solid) has no fixed volume and no fixed shape. The particles are packed together and can move about in a (gas / liquid / solid) The particles are far apart and move fast in all directions in a (gas/ liquid/ solid) A

Answer the next 2 questions using your knowledge of particles and how they are arranged in solids, liquids and gases. You must use the word 25. 26.

“particles” in both answers.

easy to squash a gas? Why does a liquid not have a fixed shape? Why is it

27. If this cold glass flask is held with warm hands, air bubbles will come out of the tube. Explain carefully why this happens. You must use the word answer.

“particles” in your

The diagram below shows an experiment to boil salty water (in the conical flask) and then collect pure water (in the test tube inside the beaker) 28. Where on the diagram are the

B A

water particles vibrating

B

least? A,B or C?

the

A C X

29. Where on the diagram are the water particles the

furthest apart? A,B or C?

Y

30. Give the correct names of the pieces of apparatus X, Y and Z in this diagram. They must be spelt correctly. D C

Z

Well done!

Now go back and check your work to make sure you haven’t made any silly mistakes.