1. Do Now: 3/13/17 1-Take out your density pages from Friday (pgs 46-51).
HW: HW: Phys/Chem Changes Story: LM pg 18.
*must have at least 10 physical & 7 chemical*
Castle Learning Test Review - due Thurs. 11:59 pm
Chemistry Part 1 Test Friday, 3/17
*snow day or not… the Test is this Friday*
Do Now: /13/17
1-Take out your density pages from Friday (pgs 46-51).
2-Answer this question in your Do Now Section:
During the last snowstorm, Mr. Ratchford chopped up firewood, carried it inside, and lit a fire in the fireplace.
What type of ‘change’ happened to the firewood? Physical Change? Chemical Change? Both? Neither?

2. Study Guide for Friday’s Test
States of Matter
Law of Conservation of Matter
Mass, Weight, Volume, and Density
Density: Calculating and Estimating
(% under water) & Density Column
Physical and Chemical Changes and properties

3. What is the density of water? (include units)
Density Practice – pg 46
What is the density of water? (include units)
2.What are two different units you can use to represent density?
3.Density is a physical property of a substance, true or false?
The density of water is 1.0 g/cm3
Dry measurement or regular object units are g/cm3
Liquid measurement units or irregular objects are g/ml
True

4. Density Practice
4. Billy’s sample of gold has a density of 19.3 g/mL. If the sample were cut into three pieces, what would the density of each new piece be?
D = M Mass g g/ml
V Volume 6ml

5. 6. What is the relationship between a cm3 and a mL? 4 5 0.2 2000
D = M V
V = M D
Density Practice
Fill in the chart
6. What is the relationship between a cm3 and a mL?
Substance
Volume (mL)
Mass (g)
Density (g/ML) A 5 20 B 3 15 C 10 50 D
100 4 5
0.2
2000
M=V X D
1 cm3 = 1 ml

6. Density Identities – pg 47
Substance
Density (g/mL)
Air (g)
0.0013
Ice (s)
0.92
Alcohol (l)
0.8
Iron (s)
7.9
Aluminum(s)
2.7
Lead (s)
11.3
Cork (s)
0.2
Marble (s)
Corn Syrup (l)
1.38
Mercury (l)
13.7
Diamond (s)
3.5
Rubber (s)
1.34
Gasoline (l)
0.7
Silver (s)
10.5
Glycerine (l)
1.26
Steel (s)
7.8
Gold (s)
19.3
Water (l)
1.00 6

7. Glycerine, Molasses, sea water, honey
We are liquids. If you mix us with water, we float on top, but if you mix us with gasoline, we sink. Who are we?
2. Although I am a solid, I am so light that I can float in any liquid listed on the table. Who am I?
3. In a mixture with water and corn syrup, we will always be in the middle. Who are we?
4. An object made of me can float in corn syrup, but not in water. Who am I?
Alcohol, Motor Oil, Vegetable Oil, Lamp oil, mineral oil
Cork (density = 0.2 g/cm3)
Glycerine, Molasses, sea water, honey
Rubber, Glycerine, honey and sea water 7

8. My density is unity (1.0g/mL.) Who am I?
6. Compare the density of regular water and sea water. Which is more dense? Why?
7. Although we are not related, 1,000 grams of me will have the same volume as 1,000 grams of aluminum. Who am I?
Water (density = 1.0 g/mL)
Sea water is more dense. It is more dense because salt is dissolved in the water.
Marble (density = 2.7 g/cm3) 8

9. Challenge Question How is the chart organized?
Alphabetically and by state of matter

10. Physical and Chemical Changes in Chemistry
Lab manual pages 6,7 and 8

11. Yes
Volume is a characteristic that does not change the chemical nature of the substance. Volume is something we can measure. 6

12. Once the substance catches fire, the chemical nature changes and new substances are formed.7

13. The lemonade molecules do not chemically combine with the water molecules.

14. false - chemical false - physical true false - chemical true
false – peroxide H2O2
true
true
true
false - physical
False - physical
false – chemical 8
true

15. P C C C P P P C
Cut it
Bake it
Rip it
Magic Marker it
Crumble it
Add it to H2O and it bubbles

16. BrainPOP
Tim and Moby explain Physical and Chemical Changes!

17. Challenge Question:
Girls ONLY: -List one physical change you can have done to your hair! -List one chemical change you can have done to your hair!
Boys ONLY: -List one physical change happening at a concession stand during a baseball game. -List one chemical change happening at a concession stand during a baseball game.