2. Ch 2 Classifying Matter

3. Draw the following chart on your paper make it big enough to fill the page & large enough to write in boxes

4. Matter Pure Substance Matter that always has same composition Mixtures Composition is not fixed

5. Pure Substance Matter that always has exactly same composition ex: salt sugar gold

6. Pure Substance Element Cannot be broken down into simpler substances Compound Made from 2 or more elements

7. Element Atom—the smallest particle of an element Ex: Carbon (C), Oxygen (O), Neon (Ne), Carbon (C), Platinum (Pt), Mercury (Hg)

8. Compound Always joined in a fixed proportion Ex: –Water (H 2 O) –Salt (NaCl) –Steam

9. Mixtures Heterogeneous different parts are noticeably different Homogeneous substances are uniformly distributed

10. Mixture-Homogeneous Homogeneous mixtures contain substances that are uniformly spread out aka: Solution Ex: Vinegar, Syrup

11. Homogeneous Aka: Solution Substances are dissolved

12. Mixture-Heterogeneous Heterogeneous mixtures have easily distinguished parts Ex: –Pizza –Salsa –Chili

13. Heterogeneous Colloid Scatters light & never settles Suspension Separates into layers over time

14. Mixture-Heterogeneous Colloids scatter light & the particles never settle Ex: Milk, smoke, fog Suspensions contain a liquid in which the visible particles settle Ex: OJ, Italian Dressing “shake it, shake it”

15. Separating mixtures Filtration – process of separating a mixture based on particle size ex: coffee filter or air filter Distillation – the process of separating a mixture based on the boiling points of the materials

16. Simple Distillation

17. Law of Conservation of Mass Matter is neither created nor destroyed mass of all substances present before a change =mass of all substances remaining after change

18. Physical Properties characteristic of a material you can observe w/o changing substances that make up the material

19. Physical Properties 1.Length 2.Temperature 3.Mass 4.boiling point 5.Volume 6.melting point 7.Density 8.conductivity 1.Odor 2.Texture 3.Sticky 4.Solubility 5.Stretchable 6.Luster 7.Taste 8.Magnetic 9.Malleability 10.hard/soft

20. Physical Changes change that does not alter the identity of substances in a material

21. Physical Changes Ex 1. Breaking6. Shredding 2. Pounding7. Crushing 3. Cutting8. Bending 4. Dissolving9. Grinding 5. Folding10.State Changes!?!

22. Chemical Properties-ability to undergo a chemical change Ex: Flammability is the ABILITY to burn (property) not actually being on fire (change)

23. Chemical Properties Reacts w/ light (fading) Flammability Reacts w/ oxygen – rust or tarnish Reacts w/ water Reacts w/ acid Can form a precipitate

24.  Tarnished Copper Tarnished Silver   Rust

25. Chemical Changes change of a substance into new substances Ex 1. Rusting 2. burning 3. Tarnishing 4. formation of a precipitate

26. Chemical Changes *Signs or indicators –Fizzing –Bubbling –color change

27. Form-ing a precipitate

28. STAR Questions List some indicators of a chemical change Fizzing, bubbling, color change, precipitate Describe difference between property and change Property is object’s ability to change, a change is action, it’s happening What type of change is evaporating? State changes = physical changes

29. Chemical and Physical Change Foldable Under the panel listed physical properties you should list the physical properties from your notes. Under the panel Chemical Properties you should list them from your notes. Under the panel Physical change you should list some scenarios that indicate a physical change. Ex. Cutting paper Under the panel chemical change you should list at least five scenarios that indicate chemical change. Ex. Rust You should also include some drawings or pictures from the magazines to go along with you foldable.