Physical Science Week 6

1. Physical Science Week 6 Unit 1 – Nature of Matter Chemical Properties & Changes

2. Standard S8P1a • Distinguish between atoms and molecules.

3. Standard S8P1.g • Identify and demonstrate the law of conservation of matter.

4. Standard S8P1.d • Distinguish between physical and chemical properties of matter.

5. Monday Warm Up (Wk 6) • If you have 100 grams of a substance and the density is 4 g/cm3; what is the volume? • Unit Test Friday – Study everything!!!

6. Cornell Notes Chemical Properties and Changes • Chemical Properties describe matter based on its ability to change into new matter that has different properties.

7. Flammability • The ability to burn

8. Reactivity • Ability of two or more substances to combine and form one or more new substances.

9. Comparing Physical & Chemical Properties • Physical properties can be observed without changing the substance. • Chemical properties, not so easy. • If you burn it to test for flammability, it is burnt.

10. Characteristic Properties • Most useful in identifying a substance • Always the same no matter the size of the sample • Density, solubility, flammability, reactivity

11. Chemical Change • A change that occurs when one or more substances change into entirely new substances with different properties.

12. Signs of chemical change • Gas produced (bubbles) • Odor • Color change • Production of heat • Sound or light produced

13. Reversing Chemical Change Cake batter to cake is a chemical change. How would you undo the change? Burn a log – how do you undo the change?

14. Law of Conservation of Mass • Mass cannot be created or destroyed in ordinary chemical and physical changes. • What goes into a reaction must come out – atom by atom.

15. Electrolysis of water • Water is separated into hydrogen and oxygen by electricity. • H2O -> H2 + O2 ___ H2O -> ___H2 + ___ O2

16. Complete p. 55

17. Tuesday Warm Up (Wk 6) • What evidence should you look for to decide if a chemical change has occurred? • Unit test Friday: Study everything

18. Physical and chemical Change Lab • Question: How do you tell if a change is physical or chemical? • Hypothesis: • Procedure: • Copy data table

20. Analyze and Conclude: 1. How can you determine if a chemical or physical change is happening? What is the most important question to ask? 2. Is one piece of evidence sufficient information to determine if it is a chemical or physical change? Give an example. 3. The Stature of Liberty was originally a copper color. After being exposed to air, she turned a greenish color. Explain what happened.

21. Physical Chemical Physical and Chemical Changes

22. Glass breaking

23. Hammering wood together to build something

24. A rusting bicycle

25. Melting butter for popcorn

26. Separating sand from gravel

27. Spoiling food

28. Mixing lemonade powder into water

29. Mowing the lawn

30. Corroding metal

31. Bleaching your hair

32. Fireworks exploding

33. Squeezing oranges to make orange juice

34. Frying an egg

35. Pouring milk on your oatmeal

36. Burning leaves

37. Making salt water to gargle with

38. Cream being whipped

39. Burning toast

40. Freezing chocolate covered bananas

41. Melting ice cream

42. Wednesday Warm Up (Wk 6) Compare and contrast chemical and physical changes with a Venn Diagram. Unit test Friday: Study everything

43. CRCT Practice • P. 60-61 #1-9 • P. 84-85 #1-9 • P. 110 – 111 #1-8 • P. 330-331 #1-11 • P. 356 – 357 #1-9

44. Thursday Warm Up (Wk 6) • How many atoms are in one molecule of C6H12O6? • What are the atoms and how many of each? • Unit test Friday: Study everything

45. Study Guide for Unit Test

46. Friday Warm Up • Study silently for unit test 5 minutes.

47. Unit Test