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1 1 KS3 SCIENCE - CHEMISTRY KS3 SCIENCE - CHEMISTRY States of Matter States of Matter

2 2 STATES OF MATTER

3 3 Matter can exist in Solid, Liquid or Gaseous form, depending on the Temperature, e.g. steam, water or ice Matter can exist in Solid, Liquid or Gaseous form, depending on the Temperature, e.g. steam, water or ice

4 4 STATES OF MATTER IceWaterSteam Temperature in degrees Centigrade

Subliming (rare) Subliming (rare) 5 5 STATES OF MATTER Melting Boiling Freezing Condensing

6 6 SOLIDS, LIQUIDS & GASES

7 7 The behaviour of Volume differs as the state of matter changes The behaviour of Volume differs as the state of matter changes Gases expand to fill any container Liquids have a definite volume Solids have a definite volume

8 8 SOLIDS, LIQUIDS & GASES The properties of Shape differ as the state of matter changes The properties of Shape differ as the state of matter changes Gases expand to fill the container Liquids fit the container’s shape Solids have definite shape

9 9 SOLIDS, LIQUIDS & GASES The Density of the material differs as the state of matter changes The Density of the material differs as the state of matter changes Gases have a low density Liquids have medium density Solids have high density

10 MASS

11 MASS When something changes state, it still contains the same amount of material When something changes state, it still contains the same amount of material

12 MASS If the amount of material present is unchanged, the Mass remains the same If the amount of material present is unchanged, the Mass remains the same

13 MASS Density = Mass Vol A gas has the same mass but much higher volume than a solid or liquid, so its density is much lower Density = Mass Vol A gas has the same mass but much higher volume than a solid or liquid, so its density is much lower

14 MASS The reason for the change in state is that higher temperature gives materials more Energy The reason for the change in state is that higher temperature gives materials more Energy

15 MELTING & BOILING

16 MELTING & BOILING We can find the melting point and the boiling point of a substance by heating it up with a Thermometer We can find the melting point and the boiling point of a substance by heating it up with a Thermometer

17 MELTING & BOILING Temperature Reached 0 C Time

18 MELTING & BOILING Temperature Reached 0 C Once the substance begins to melt or boil, temperature stays steady until all the solid or liquid has gone Once the substance begins to melt or boil, temperature stays steady until all the solid or liquid has gone Melting Starts Melting Starts Melting Finishes Melting Finishes Boiling Starts Boiling Starts Time Boiling Finishes Boiling Finishes