CHEMISTRY

States of Matter

1. Complete the sentences below:

There are three states of mater - (a) ................... (b) ...................... and (c) ...................

The particles in a solid are packed ..................... together. The particles are fixed in

position, but they do v................. The particles in a ..................... can move around, but

there is still very little ..................... between them. In a gas, particles move around very

.................. There are large .................... between particles.

When particles get closer together, for example when a gas c...................., energy is given

out. On the other hand, we need to supply ................ to increase the distance between

particles. An example is when a solid ...........................

2. (a) What do we call these changes:

(i) Solid Liquid

(ii) Liquid Gas

(iii) Gas Liquid

(iv) Liquid Solid

(b) Which of the changes in (a) require us to provide energy, and which give out

energy?

3. Describe the movement of the particles on a solid substance as it is heated to its boiling

point.

4. Look at this cooling curve for substance X as it turns from a liquid to a solid.

(a) What is the freezing point of X?

(b) What is the melting point of X?

(c) What was the room temperature that day?

Choose the most appropriate answer from the options given for each question.

5. What is matter?

a. Matter is anything that flies.

b. Matter is anything that occupies space.

c. Matter is anything that has definite shape.

6. What are the basic building blocks of matter?

a. particles

b. atoms

c. compounds

7. What is the state of matter that has no fixed shape and no fixed volume?

a. solid

b. liquid

d. gas

8. What is the common property of solid, liquid and gas?

a. They are all living things.

b. They have definite shape.

c. They have the same mass.

9. How do you call the change in a state of matter from a gas to a liquid?

a. evaporation

b. condensation

c. freezing

10. Maria filled her glass with water. When she put ice into the glass, the water level rose.

Why?

a. The ice was too big.

b. The ice took up some space in the glass.

c. The water expanded due to low temperature.

11. Categorize the following items as solid, liquid or gas.

pencil water soda nitrogen ice cream

shampoo steam table wallet car

12. Draw a diagram to represent 8 particles in each state of matter.

SOLID LIQUID GAS