1. Monday Mystery Element Grab 1 calculator for each group! (2 if enough)
Catalyst – November 9+2+4, 2010
Monday Mystery Element
Radioactive actinide
Named for the Scandinavian god of war
Oxide used to make filaments in camping lanterns
I hyperlinked the picture of the stopwatch to
Grab 1 calculator for each group! (2 if enough)

2. Monday Mystery Element
Catalyst – November 9+2+4, 2010
Monday Mystery Element
Radioactive actinide
Named for the Scandinavian god of war
Oxide used to make filaments in camping lanterns
I hyperlinked the picture of the stopwatch to
THORIUM

3. Unit 6 Test Review Wednesday
Today’s Agenda
Catalyst
Can Crusher Demo!
Density Notes
Work Time/Mini-Lab
Exit Question
Unit 6 Test Review Wednesday
Unit 6 Test on Thursday

4. Today’s Objectives
SWBAT calculate density of a substance using mass and volume.
SWBAT compare the densities of common substances.

5. Demo Time!
CAN CRUSHER!!!!!

6. What is Density??
Key Point #1: Density is the relationship between mass and volume

7. Mass is the amount of matter a substance has
Don’t Forget!
Mass is the amount of matter a substance has
Unit: grams
Volume is the amount of space an object takes up
Unit: mL or cm3

8. Boxes of Matter 1 2 Which box has the larger volume?
Which box has the larger mass?
Which box is more dense? 1 2

9. MUSCLE vs. FAT

10. How to Calculate Density??
Key Point #2: If you know the mass and volume of a substance, you can use the following formula to calculate density….

11. So what are the units for density (D)?
Density Formula Work
So what are the units for density (D)?
g/cm3 OR g/mL

12. Density Formula Practice
The mass of a can of air freshener is 112 g. The volume of the can is 118 mL. What is the density?
The mass of a bottle of Shout Ultra Gel is 246 g. The volume of the bottle is 200 mL. What is the density?

13. What if we already know density?
How to find mass (M)?
How to find volume (V)?
M = D x V M
V = D

14. Density Formula Practice
The density of a Kit-Kat bar is g/mL. The volume of the Kit-Kat is 10 mL. What is the mass?
The mass of a Hershey’s bar is 43 g. The density of the Hershey’s bar is g/mL. What is the volume?

15. Class Work Time
You have 15 minutes to complete the worksheet – then we will go over the questions 1-6
We will go over the answers in minutes, then do a mini-lab
Ask questions now if you have them!
Finish the worksheet for homework

16. Mini-Lab Demo: Density of aluminum
Each group will collect data (mass) to calculate the densities of different common substances
We will then share our results

17. Data Table Material Volume (cm3) Mass (g) Density (g/cm3) Aluminum
Steel (Black)
Copper
Brass
Oak
Pine
Poplar
Nylon (White)
Acrylic (Clear)
PVC (Gray)

18. Data Material Volume (cm3) Mass (g) Density (g/cm3) Aluminum
Steel (Black)
Copper
Brass
Oak
Pine
Poplar
Nylon (White)
Acrylic (Clear)
PVC (Gray)
15.625
15.625
15.625
15.625
15.625
15.625
15.625
15.625
15.625
15.625

19. Exit Question
What is the mass of an object with a volume of 3.2 cm3 and a density of 2.0 g/cm3? (Hint: figure out what formula to use first!)
HOMEWORK: Finish Density Worksheet
Work on Review Sheet, Test Thursday!
“Prejudices, it is well known, are most difficult to eradicate from the heart whose soil has never been loosened or fertilized by education; they grow there, firm as weeds among rocks.”