2. Contents 7G Solids, Liquids and Gases Properties of solids, liquids and gases Summary activities Diffusion Introducing states of matter The particle model
3. Different substances What different types of materials are there? M ercury A luminium T in E thanol R adium I ron A rgon L ead Aluminium Lead Argon Iron Radium Ethanol Tin Mercury What are the names of the substances described in this table? (The first letters spell out another word for ‘substance’.) Solid used by Roman plumbers Unreactive gas Solid that rusts Radioactive solid Intoxicating liquid Solid used to coat steel cans Solid used in aircraft Liquid metal
4. Three states of matter solid liquid gas At room temperature most substances exist in one of three physical states.
7. Contents 7G Solids, Liquids and Gases Properties of solids, liquids and gases Summary activities Diffusion Introducing states of matter The particle model
12. Contents 7G Solids, Liquids and Gases Properties of solids, liquids and gases Summary activities Diffusion Introducing states of matter The particle model
15. Contents 7G Solids, Liquids and Gases Properties of solids, liquids and gases Summary activities Diffusion Introducing states of matter The particle model
16. How do smells spread out? Where is the smell coming from and how does it spread out?
21. Contents 7G Solids, Liquids and Gases Properties of solids, liquids and gases Summary activities Diffusion Introducing states of matter The particle model
22. Glossary diffusion – Particles spreading out and mixing in the gas or liquid state. gas – The state of matter in which particles move quickly in all directions and rarely touch each other. liquid – The state of matter in which particles are randomly arranged and touch each other. matter – The stuff that everything is made of. particle – The smallest unit of matter. pressure – The f orce produced when particles move against a surface. solid – The state of matter in which particles are in a fixed arrangement and touch each other.
