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Matter

• The properties of solids and liquids.
• Solids and liquids expand when heated.
• Solids and liquids contract when cooled.
• When a solid melts it becomes a liquid.
• The temperature at which a solids changes to a liquid is called the 'melting point'.
• The melting point and the freezing point are the same temperature for the same substance.
• The properties of gases.
• The names of 5 common gases.
• The air is about 21% oxygen, 78% nitrogen with small amounts of other gases.
• Oxygen is needed for animas to live.
• Oxygen relights a glowing splint
• The 3 states of matter are solid, liquid and gas.
• Solids and liquids are harder to compress than gases.
• Everything is made of very small particles.
• The temperature at which a liquid changes to a gas is called the 'boiling point'.
• Diffusion is when particles move and mix of their own accord.
• Particles vibrate in solids, move about in liquids and move faster in gases.
• Gases diffuse faster than solids and liquids.
• A solid is said to 'dissolve' if it disappears in a liquid'.
• The liquid produced when a solid dissolves is called a solution.
• Solids which dissolve are called soluble.
• Solids which do not dissolve are called insoluble.

• Observe differences in the ways that solids and liquids behave.
• Classify substances as solid or liquids.
• Use data tables to find melting point values.
• Make predictions about substances from their melting points.
• Collect a gas over water.
•  Make a summary table to show the differences between solids, liquids and gases.
• Test for oxygen gas.
• Use an electric balance.
• Draw diagrams to show the arrangement of particles in solids, liquids and gases.
• Use particle diagrams to explain about compressing solids, liquids and gases.
• Test solids to if are soluble in water.
• Plan an investigation about dissolving.