Year 4 Cambridge Science - Ch 5: Materials, Substance & Particle

Match the keywords to its meaning.

• the matter that an object is made of

• the model that describes the way particles in matter are arranged and how they move about

• particle model

• particles

• tiny units that make up matter

• material

Match the following

• substance

• a process that results in the formation of one or more new substances

• physical change

• a change in which no new substance is formed

• chemical change

• something that is made of one type of matter

Match the following

• particles

• tiny units that make up matter

• freezing

• the process of changing from a liquid to a solid

• melting

• the process of changing from a solid to a liquid

Rearrange the properties of solid, liquid and gas according to particle arrangement.

Groups:

(a) solid

,

(b) liquid

,

(c) gas

• Particles are closely-packed in a regular pattern.

• Particles can move over each other.

• Particles are close together, but random.

• Particles vibrate on the spot.

• Particles are spread out and can move about quickly in all directions.

Liquid takes the​ (a)   of the container it is in. It stays the same​ (b)  

• shape
• volume.

Solid keeps its shape unless a ​ (a)   is applied to it. It remains the ​ (b)   volume.

• force
• same

Gas does not ​ (a)   its shape. It can ​ (b)   out to fill the space it is in.

• keep
• spread

Solids and liquids have a ____ volume.

Why does a solid has a fixed shape?

Solids can behave like a liquid. Circle the correct answer.

• water

• flour

• chair

• salt