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: 3/13/17 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?

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

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

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 116g 19.3 g/ml V Volume 6ml

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

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

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

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

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

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

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

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

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

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

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

BrainPOP Tim and Moby explain Physical and Chemical Changes!

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.