1. Pre-Class 8-23-13 Friday Write the following in scientific notation: 22000 mg = _____ mg 0.005 km = _____ km

2. GETTING IT STRAIGHT Materials: –Pieces of wire, PVC, wood –Ruler –Electronic scale –Graph paper Procedures: –Acquire each different size of wire, tile, or wood –Measure their length –Record those values in the chart (be sure to use the proper units) –Graph mass versus length –Answer the questions at the end

3. Fill-in the spaces below Small (cm) small mass (g) Large (cm) Large mass (g) Medium (cm) Predict mass (g) WIRE PVC WOOD

4. Questions 1)Measure the mass of the medium piece. Did it match your predicted value? 2)What are your sources of error for this lab? 3)Did those errors affect your results? Explain. 4)If you continue each line, where should it cross the y-axis? Why? 5)How would you describe the relationship between mass and size: linear or nonlinear? Explain.

5. Chapter 2: Matter

6. CLASSIFICATION OF MATTER Matter (substance): anything that has mass and takes up space (element or compound) Element: substance made of only one type of atom Compound: substance made up of more than one type of atom

7. Mixture: compound of two or more substances Homogeneous  A mixture where two or more substances are spread out evenly  cannot determine other substances in the mixture  special type, solution (usually clear) Heterogeneous  a mixture where two or more substances can distinguished  can determine other substances in the mixture  colloid: particles in mixture do not settle  suspension: particles in mixture eventually settle

8. Monday Pre-Class 8-26-23 Which of the following are compounds? a.Sulfur, S b.Methane, CH 4 c.Carbon monoxide, CO d.Cobalt, Co

9. Elements and Compounds (homogeneous or heterogeneous mixture) Q.If you know the name of a substance, how can you find out whether or not it is an element?

10. Density How much matter (mass) is contained in an object (Volume) Ratio of the mass of an object to the volume of an object D = m / V Helps determine if an object will float DV m D: density (g/cm 3 )m: mass (g)V: volume (cm 3 )

11. Tuesday Pre-Class 8-27-13 Give an example of a heterogeneous mixture.

12. Float or Sink Objective –To investigate the buoyancy of objects. Materials –Beaker –Water –Film can –Masses –Electronic balance Procedures –Measure the volume of the film can. –Fill the can with water and find its mass. –Empty the film can. –Place a mass in the can and put the lid on tightly. Find its mass. –Put into beaker half filled with water. –Make your observations. –Repeat to complete chart.

13. Chart to fill-in Film can plus mass% below waterDensity Volume of can = _____ cm 3 mass of can with water = _____ g

14. Classifying Matter Physical Property –A substance’s size, shape, color, texture, look, feel, etc. –What you can see (outside) Physical Change –A change in the physical properties of a substance Chemical Property –A substance’s composition or arrangement of particles –What we cannot see (inside) Chemical Change –A change in the particle composition of a substance

15. IDENTIFY THE TYPE OF PROPERTY OR CHANGE 1. Fading of dye in cloth 2. Growth of a plant 3. Formation of clouds 4. Paper burning 5. Photosynthesis 6. Grinding meat into hamburger 7. Drying clothes 8. Burning charcoal 9. Producing light in an incandescent bulb 10. Digestion of food 11. High melting point 12. Reacts with air 13. Has a sweet odor 14. Breaks easily 15. Fizzes when vinegar is added 16. Rust

16. Pre-Class Wednesday 8-28-13 Freezing, boiling, and evaporating are all examples of _____. a)Chemical property b)Chemical change c)Physical property d)Physical change

17. Concept Map Let’s see if we can fill-in the missing words from the bubbles on the left MATTER

18. Tyndall Effect Objective –Categorize various mixtures using the Tyndall Effect Materials –Beaker –Scale –Stirring Rod –Flashlight –Water –Various chemicals or compounds Procedures –Make a Tyndall Viewer (done in class) –Each group will prepare two test mixtures (same compounds, different amounts) –Determine the type of mixture.

19. Substance Amount added HypothesisObservations Type of mixture

20. Questions Did the lab help you determine the type of mixtures? Explain. Were you correct in your hypothesis of each mixture? Why did we test plain water? If a mixture is translucent, how would you determine if it is a colloid, suspension, or solution?

21. Pre-Class Friday 8-30-13 What does D, m, and V mean in the following equation: D=m/V?