Upcoming SlideShare
×

# 1/11/12

183
-1

Published on

0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total Views
183
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
1
0
Likes
0
Embeds 0
No embeds

No notes for slide

### 1/11/12

1. 1. 1/11/12 A/B DayLEQ: What is the difference between a physicaland chemical change and how can we tell whenthey happen?1. What is the difference between a mixture and asolution?2. In a glass of chocolate milk, what is the solvent andwhat is the solute?3. What does solubility measure?4. A scientist needs to use a material that will not getvery hot. Should the scientist use something with aHIGH specific heat or a low specific heat?5. EXPLAIN your answer to #4!
2. 2. Let’s Review:If each of thesematerials isexposed to thesame amount ofheat, which onewill be theCOOLEST?
3. 3. HOT Q: If 5 grams of gold melts at200° C, what temperature will cause50 grams of gold to melt?
4. 4. HOT Q: Which pure substance iscomposed of more that oneelement? a.Carbon b.Gold c.Water d.Sodium
5. 5. Let’s Review! NONMETALSMETALS METALLOIDS
6. 6. Help a Scientist pick the right element:1. A metal2. A nonmetal3. A metalloid4. Something malleable5. Something ductile6. Something that is magnetic7. Something that will conduct heat8. Something that will block heat9. Something that is a semiconductor
7. 7. FIND THAT ELEMENT!1. GROUP 1, PERIOD 1 =2. GROUP 6, PERIOD 7 =3. GROUP 2, PERIOD 5 =4. GROUP 9, PERIOD 4 =5. GROUP 17, PERIOD 3 =6. GROUP 11, PERIOD 4 =
8. 8. EOG Question:How can a scientist, using the periodictable, find an element with properties similar toanother element? a) by comparing density b) by finding its periodic group c) by comparing malleability d) by comparing atomic weight
9. 9. Chemical MechanicalWeathering Weathering
10. 10. CHEMICAL WEATHERING:• Chemicals break down rock by chemically changing the rock• Usually indicated by color change!• Example: Acid Rain, rust
11. 11. MECHANICAL WEATHERING:• Physical changes to rock(rocks break into smaller pieces)• Example: ice, salt, wind, and water break down rocks
12. 12. Today’s LEQ: What is the difference between a physical and chemical change and how can we tell when they happen?By the end of today, you should be able to…1. Describe the difference between an physical and chemical change.2. Use observable evidence to decide if a change is chemical or physical
13. 13. FOCUS VOCABULARY:87. Chemical Change88. Physical Change
14. 14. ACTIVATOR: Draw this in your notes
15. 15. Record 3-5 observations you have about the paperHow does the paper lookdifferent?What changed about thepaper?What happened to thepaper?
16. 16. Record 3-5 observations you have about the paperHow does the paper lookdifferent?What changed about thepaper?What happened to thepaper?
17. 17. Demo: Tearing Paper, Burning PaperHow are the twodemos different?
18. 18. Changing SubstancesPhysical Change: Chemical Change:Ex. Ex.Evidence: Evidence:1. 1.2. 2.3. 3.4. 4.
19. 19. Draw this in your notes: Changing SubstancesPhysical Change:changes the physicaltraits of asubstance, NOT theidentity of thesubstance TEARING PAPER!
20. 20. Physical Change: Tearing paper Paper
21. 21. Draw this in your notes: Changing SubstancesPhysical Change: Chemical Change:changes the physical substance is changedtraits of a into a new substancesubstance, NOT the (changes the identityidentity of the of something)substance Ex. Burning Paper!
22. 22. Chemical Change: Burning paper PaperBurnt Paper is a DIFFERENT SUBSTANCE!
23. 23. BrainPop: Changing Properties
24. 24. Changing SubstancesPhysical Change: Chemical Change:Ex. Ex.Evidence: Evidence:1. 1.2. 2.3. 3.4. 4.
25. 25. Instructions:I give you: 8 different types of evidencethat happen during physical and chemicalchangesYou: use your brain to decide which ofthe things is evidence of physical changeand which of the things is evidence ofchemical change
26. 26. Physical Chemical -Changes color -Melting, freezing, or boilingEVIDENCE -Burst of heat -Change in mass or volume -Smoke forms -Change in shape -Usually reversible -Usually irreversible
27. 27. Physical Change: Chemical Change:Evidence: Evidence:1. Melting, freezing, or 1. Changes colorboiling 2. Burst of heat2. Change in mass orvolume 3. Smoke forms3. Change in shape4. Usually reversible 4. Usually irreversible
28. 28. What evidence can we use to tell this is a physical change? Paper
29. 29. What evidence can we use to tell this is a chemical change? PaperBurnt Paper is a DIFFERENT SUBSTANCE!
30. 30. Physical Change: Ice melting
31. 31. Chemical Change: Making Water + Two One WaterHydrogen Oxygen Atoms Atom
32. 32. Chemical orPhysical?
33. 33. Melting Ice
34. 34. Burning Wood
35. 35. Chopping Wood
36. 36. Digesting an apple
37. 37. Breaking Glass
38. 38. Melting Iron
39. 39. Bicycle rusting
40. 40. Melting Ice Cream on a hot day
41. 41. Cooking a steak
42. 42. Mixing Peas and Carrots
43. 43. Rotting Banana
44. 44. Draw this in your notes:
45. 45. SORT THESE!! A nail rusting
46. 46. HOT Q: How do physical and chemical changes relate to thedifferent ways that the surface of the earth changes over time??
47. 47. Key Points:1. A _________ changes the physical characteristics of a substance.2. A __________ changes something into a new substance.3. Changing color is evidence of a ___________.4. Changing phases or states of matter is evidence of a __________________.
48. 48. Summarizer:1. What is the difference between a chemical change and physical change?2. Is melting copper an example of a physical or chemical change?3. How can you tell the answer to #2?4. Is a rusting nail an example of a physical or chemical change?5. How can you tell the answer to #4?
1. #### A particular slide catching your eye?

Clipping is a handy way to collect important slides you want to go back to later.