1. Test 1 Lab Test 18-20 ?s Lab format with follow up questions – Measure – Observations – PP, CP, PC, CC – Inquiry – Substances/mixtures Written Test 42 ?s MC (multiple choice) One free response All items from study guide

2. Matter What are the 3 states of matter? SOLID, LIQUID, GAS Animation

3. Elements Pure substance

4. Compounds Compound = a pure chemical substance of 2 or more different elements that can only be separated into simpler substances by chemical reactions Ex: H2O, CO2, Sugar, Salt

5. Mixtures Mixture = when 2 or more substances combine (physically) and both substance keep their individual properties Ex: – flour & sugar – Salt water – Salad

6. Types of Mixtures Heterogeneous Can be visibly and easily separated Particle size is bigger or can eventually separate/settle Homogeneous Cannot separate by looking at it Uniformly distributed Oftentimes solutions

7. HE or HO Vinegar Sand Air Sugar water Vinegar + oil Chex mix

8. Physical & Chemical Characteristics PHYSICALCHEMICAL Refers to physically related things Refers to what it is made up of (how the atoms are rearranged to make a new thing); reacts

9. Physical or Chemical Physical = it looks different BUT the atoms are still the same you could reverse it Chemical = may or may not look different BUT the atoms are rearranged differently you CAN’T reverse it * Unless you do another chemical reaction

10. Properties What is a property? Describes, talks about it’s ability to… Can be physical or chemical Has it CHANGED yet?.... NO Does it describe it/have ability to change?

11. Examples of Properties Front Desk: PHYSICAL PROPERTIESCHEMICAL PROPERTIES

12. Changes When it actually changes Physical: changes size, shape, state, color but its still the same thing – Remember the 4 S’s Chemical: changes what it completely is, chemical reactions, atoms are rearranged – Remember OCPGT + N

13. Examples of changes Tearing paper Burning paper Breaking wood Campfire Mixing kool aid Cooking a cake Physical change Chemical change

14. Property vs. Change Property = description or could change in the future Change = change 5 evidences of a chemical change PCOGT – “Pirates can obtain great treasures” – Precipitate (solid forms) – Color change – Odor(smell) – Gas forms – Temperature change – Evidence of a chemical change Evidence of a chemical change – http://resources.educ.queensu.ca/science/main/concept/gen/g09/N.%20Sabet/precipitation.jpg

15. Property or Change? Boiling point 2 different liquids mix  bubbles Food coloring in water Burning an egg It has a yellow color It produced a smell Property Change

16. PP Volume Density Freezes at 30 C Boiling point Can melt at room temperature Flexible Magnetic Bouncy Floats Solid, liquid, gas state of matter CP Flammable/non flammable Can rust Can tarnish Can burn Can react with water PC Breaking a stick Dissolving kool aid Food coloring in a liquid Cutting hair Bending metal Scrapping a crayon Melting chocolate Evaporated water CC Gas produced Light given off Odor produced Diet Coke + Mentos = Bubbles Baking Soda + Vinegar = colder Photosynthesis Respiration Rusting Leaves changing color

17. Which of the following is an example of a chemical property of water? – A. Boils at 100 C – B. Is transparent – C. Has no odor – D. Reacts with calcium Is it still water (H2O) Transparent = see through/clear No smell Reacts = chemical reaction

18. Which of the following is an example of a physical property of hydrogen? It A. Is less dense than air B. Reacts with oxygen C. Is highly flammable D. Forms hydrochloric acid PHYSICAL PROPERTY

21. Chemical Equations Can you identify: Reactant + reactant  product + product product + product reactant + reactant

22. Practice 6 CO 2 + 6 H 2 0  C 6 H 12 O 6 + 6 O 2 carbon dioxide + water  sugar + oxygen Circle the reactants: Box the products: What is this equation?

23. Practice Fe + O2 + H2O  Rust 2Mg + O2  2MgO

24. Law of Conservation of Mass Total mass of reactants = Total mass of products 5g H20 + 5g O2 = _____ g 2H2O2 10g = 10g

25. Law of Conservation of Mass Same # of atoms on reactant side as the product side 2H 2 + O 2  2(H 2 O) H= ____H=____ O= ____O=____ 4 2 2 4

26. Practice Mg + O 2  MgO Mg = ____Mg= ____O = _____ Oxygen Mg Oxygen

27. Inquiry IV DV Constants Control