Year 7 Science

Year 7 Science

Chemistry

States of Matter

Matter is anything that have ...

• mass (kg)

• occupies space (have volume)

Imagine all these furnitures are inside your room :)

What happened if you remove all of them, how will your room look like?

Non-matter

• light

• heat

• shadow

Matter can be classified into ...

• living matter (bacteria, human, plant, animals)

• non-living matter (table, chair, hair, air, cup)

3 States of Matter

• Solid

• Liquid

• Gas

Solid

• particles are closely packed

• minimum spaces in between

• particles vibrate about their fixed positions

• fixed volume

• fixed shape

• cannot be compressed

Liquid

• particles are less closely packed as compared to solid

• particles have move spaces to move around

• fixed volume

• no fixed shape

• cannot be compressed

Gas

• particles are very far apart

• particles are move freely in any direction

• no fixed volume

• no fixed shape

• can easily compressed

Look at this balloon!

What do you observe?

• gas particles are free to move around

• no fixed volume

• no fixed shape

• can be easily compressed

Multiple Choice

Liquids can be compressed.

• True

• False

Multiple Choice

Liquid takes up the shape of the container.

• True

• False

Multiple Choice

Particles in gaseous state are free to move around.

• True

• False

Multiple Choice

When solid changes into liquid, the molecules _________.

• break up into smaller particles

• become very big

• become very close

• move further apart