1. Warm Up: Density of Ice
A block of ice 2 cm on each side has a mass of g. What is the density of the ice? (Hint, don’t forget to find the volume of the ice first!)

2. Warm Up: Density of Ice
Does the density of ice you calculated make sense? Why or why not?

3. Warm Up: Density of Ice
Draw a dot diagram to compare the density of ice and water.

4. Density of Ice
Does a bigger ice cube have more, less, or the same density as a smaller ice cube?

5. Class Data How does the volume of a material affect its density?
Different
Same
N/A

6. Class Data How does the volume of a material affect its density?
Different
Same
N/A 10 7 5

7. Class Data How does the volume of a material affect its density?
Different
Same
N/A 10 7 5 13 3

8. Density of Chocolate Lab!

9. Density of Chocolate Lab!
Question: What happens to density as you decrease an object’s size?

10. Review: Measurement and Units
When we measure mass we use a _______________.
The units for mass are _________.
When we measure volume of a square or rectangular object we use a _______________.
When we measure the volume of an irregularly shaped object like a stone we use ____________.
The units for volume are _________.
We calculate density by using the equation _______.

11. Exit Ticket
What happens to a material’s density if you compare different volumes of the same material?
How did today’s lab affect your thinking about Question 1?
How confident do you feel in describing density? How can we help you become more confident?

12. Warm Up: Lead vs. Mercury
Lead: Metal, solid at room temperature
Density: g/cm3
Mercury: Metal, liquid at room temperature
Density: g/cm3

13. Warm Up: Lead vs. Mercury
Record your observations
How can understanding density help us explain why some objects float while others sink?
“Horrifyingly Dangerous Experiment” Video Link

14. What is the density of CO gas if 0.196 g occupies a volume of 100 cm3?
Density Warm Up
What is the density of CO gas if g occupies a volume of 100 cm3?