Gas

Key Stage 2

Gas is a state of matter that can change size and shape to fit any container.

Most gases are invisible but we can feel them.

When the air moves we call it the wind.

Gases are a **state of matter** that:

Cannot hold their shape. Fit the shape of their container. Can be poured and will flow.


Gases can be squashed into a smaller size.

Examples of gas materials:

Gas is a State of Matter in which the particles are separated by large distances and can move freely.


Gases cannot hold their shape because the particles are free to move. Gases fit the shape of their containers because the particles are free to move. A gas can be poured and will flow because the particles are free to move.


Gas can be squashed into a smaller size because the particles are spread apart.

Gases
Particle Diagram	Particle Arrangement	Property
	Particles are free to move in all directions.	Gases fit the size of their container.
		Gases fit the shape of their container.
		Convection happens most easily in gases.
	Particles are spread apart.	Gases can be compressed into a smaller volume.
		Sound passes through gases slower than liquids and solids.
		Thermal Conduction is very poor in a gases.