7g Particles Test Sen 2004

You may write on this sheet

Name ______________________

Tutor Group _________

For questions 1 to 8 choose the correct word from the brackets to make each sentence correct 1. Glass is used in windows because it is (hard / transparent/ solid) 2.

Steel is used to make spoons because it is (expensive / hard / magnetic)

3.

Copper is used for wires because it conducts (heat / electricity / sound)

4.

Foam is used in packaging because it is (white / dense / light)

5.

Rubber is used in bicycle tyres because it is (hard/ flexible / natural)

6.

Plastic is used for washing up bowls because it is (man-made/waterproof)

7.

An example of a material that is liquid is (steam / sugar / syrup)

8.

When water is a gas it is called (ice / empty space / steam )

Look at the diagrams below, which show how water molecules are arranged as a solid, as a liquid and as a gas. Then answer questions 9 to 11. 9.

Diagram A shows a _______________

10.

Diagram B shows a _____________

11.

Diagram C shows a _______________

A

B

C

For each substance in Question 12-17, state whether it is a solid, liquid or gas. 12. carbon dioxide _____________

15. blood ____________

13. milk ___________

16. sand ______________

14. leaves ____________

17. breath ______________

For questions 18 to 24 choose the correct word from the brackets to make each sentence correct. 18.

A (gas/ liquid/ solid) has a fixed shape and is rigid.

19.

A (gas/ liquid/ solid) flows and takes up the shape of its container.

20.

A (gas/ liquid/ solid) spreads out to occupy all the space available.

21.

A (gas/ liquid/ solid) has a fixed volume and a fixed shape.

22.

A (gas/ liquid/ solid) has no fixed volume and no fixed shape.

23.

The particles are packed together and can move about in a (gas / liquid / solid)

24. The particles are far apart and move fast in all directions in a (gas/ liquid/ solid). 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 “particles” in both answers. 25. Why is it easy to squash a gas but very difficult to squash a liquid?

26.

Why does a liquid not have a fixed shape?

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 “particles” in your answer.

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 water particles vibrating the least? A,B or C? _____________ 29. Where on the diagram are the water particles the furthest apart? A,B or C? _______________

B A B

A C X 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

X= ______________________________ Y= ______________________________ Z= ______________________________

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