1. CHEMISTRY: The study of matter and the changes it undergoes

9. Chemistry: Atoms, Elements and Compounds Properties of Matter Elements and the Periodic Table Chemical Compounds

10. THE PARTICAL THEORY OF MATTER matter: anything that has mass and takes up space The main ideas: 1.All matter is made up of tiny particles that have empty spaces between them. 2.Different substances are made up of different kinds of particles. 3.Particles are in constant random motion. 4.The particles of a substances move faster as its temperature increases. 5.Particles attract each other.

11. Three states of matter: Solid Liquid Gas

12. PURE SUBSTANCES A substance that is made up of only one type of particle ex. distilled water

13. MIXTURES

14. mechanical mixture: a mixture in which two or more different types of matter can be seen solution: a uniform mixture in which the two or more types of matter cannot be distinguished – looks like a pure substance but contains more than one type of particle

15. Alloys An alloy is a type of solution Combination of two or more metals

16. SUMMARY The particle theory of matter descirbes the composition and behaviour of matter A pure substances is made of only one type of particle A mixture is made up of at least two different types of particles A mechanical mixture contains more than one type of particle, and the different types of particles are visible A solution contains more than one type of particle but the different types of particles cannot be distingushed visually An alloy is a solution composed of two or more metals

17. Check your understanding: 1.Use the particle theory to explain why water changes from a solid to a liquid when it is heated. 2.Give three examples of a pure substance (not mentioned during class). 3.Give three examples of a solution. 4.Give three examples of a mechanical mixture. 5.Identify each of the following as a mechanical mixture or a solution: (a) glass, (b) chocolate chip icecream, (c) apple juice, (d) pizza, (e) vinegar, (f) maple syrup, (g) relish, (h) concrete, (i) sand, (j) perfume