1. Matter

2. What is matter? – Anything that has volume (takes up space) and has mass. So… what is mass? – Amount of matter that something contains Difference between mass and weight? – Weight is force of gravity on mass

3. Properties of Matter Characteristics used to describe something What are some examples? Properties may be – Qualitative – Quantitative

4. Properties Qualitative – Has to do with qualities – Examples Quantitative – Has to do with quantities - measurements – Examples:

5. Models What do we mean by models? – A representation of something to make it easier to understand, or more manageable. Examples of models: – Model airplane or car – Others? – Scientific models May be mathematical or physical (visual) …

6. Models of Water

7. Day 2

8. Properties Physical – Characteristics that don’t involve a change in identity. Substance doesn’t change into something else. Chemical – Characteristics that do involve a change in identity. Can only be seen when substance does change into something else.

9. Changes Physical – Substance doesn’t change into something else. – Example: tearing paper Chemical – Substance does change into something else. – Example: burning paper

10. Property vs. Change Property – Like Noun Change – Like Verb

11. Classification of Matter

12. Now that we have defined chemical and physical properties of matter, we can use that to help us classify it. One way chemists classify matter is based on its purity.

13. Classification of Matter Pure Substance – Matter that has only 1 set of chemical and physical properties. Example: Pure water always has the exact same chemical and physical properties under the same conditions. If water ever tastes different then it isn’t pure water; it fits into our next category.

14. Classification of Matter Mixture – Two or more pure substances mixed together. Each substance in the mixture retains its own set of chemical and physical properties. Example: Copper and Zinc can be mixed together to produce brass. Even though it may look different, it is still copper and zinc. Each metal retains its own properties like melting point.

15. Classification of Matter Mixture – Two or more pure substances mixed together. Each substance in the mixture retains its own set of chemical and physical properties. Unlike pure substances, mixtures can always be separated by physical means. How could we separate the copper and zinc back out?

16. Mixtures Mixture – Two or more pure substances mixed together. Each substance in the mixture retains its own set of chemical and physical properties. If a sample of sand contains iron and salt, how could you separate them from the other minerals?

17. Mixtures Some mixtures are more evenly distributed than others. Heterogeneous mixture – Uneven distribution of substances. - You can see the different parts. Examples: Sand Granite Wood

18. Mixtures Some mixtures are more pure than others. Heterogeneous mixture – Uneven distribution of substances. - You can see the different parts. Examples: Milk Blood

19. Mixtures Homogeneous Mixture – Components are evenly mixed. Salt water contains salt and water, but are mixed all the way to the atomic level - Cannot see the parts., but it can still be separated by physical means. Seawater distillation plant

20. Day 3

21. Pure Substances Pure substances can be divided into 2 categories: compounds and elements.

22. Pure Substances Elements – Substances made up of only one type of atom. - Cannot be separated by any physical OR chemical process. Examples: Carbon Helium Gold

23. Pure Substances Compound – Two or more elements chemically bonded together. Examples: Carbon Dioxide (CO 2 ) Water (H 2 O) Salt (NaCl) Sucrose (C 12 H 22 O 11 )

24. Pure Substances Compounds have only 1 set of properties. They cannot be separated by any physical process. - Can only be separated by a chemical reaction. Water can be separated into Hydrogen and Oxygen by a process called Electrolysis.

25. Matter Mixture Pure Substance Element Compound Heterogeneous Mixture Homogeneous Mixture Can be separated physically Cannot be separated physically Can see the parts Cannot see the parts Can be separated chemically Cannot be separated Most impure Most pure