1. Density Lab

2. Warm - Up What is density? What is the formula for density?
Pass the sugar boxes around the classroom. Each box has a different density. Make a hypothesis about what is inside each box

3. Objective Today I will be able to:
Apply the formula for density to problem solving
Calculate density by using different laboratory techniques

4. Homework
Density practice problems

5. Agenda Warm – Up Density Notes Density Lab Density practice problems
Exit Ticket

6. Density Notes

7. What is the formula for density?

8. Density = Mass Volume

9. What are the units for density?

10. Solid - g/cm3 Liquid – g/ml

11. What is density… more specifically
Physical Property
Density reveals how tightly the molecules composing the matter are packed and how heavy the molecules are
Compared to the liquid they are in, less dense materials float, more dense sink
Substances are often IDed by their density, as it is rare for two substances to have the same density

12. Density and States of Matter
Solids – composed of tightly packed molecules, low kinetic energy, high density (Iron)

13. Density and States of Matter
Liquids – more loosely packed than solids, density less than solids (water)

14. Density and States of Matter
Gases – molecules are all over the place, density less than solids and liquids (air)

15. How to Calculate Density
Mass is determined using a scale
Volume is calculated several different ways

16. Finding Volume
To find the volume of a liquid, use a graduated cylinder
Make sure to read the bottom of the meniscus

17. Finding Volume Length x Width x Height
Volume of a regular object, such as a wooden block

18. Finding Volume Water Displacement Method
- Read the initial volume of water in a graduated cylinder
- Place object into cylinder
- Read the final volume of water
- Final – Initial = Volume of the object

19. Odd Shaped Marble Lab
Complete the density lab at your desk, when you finish complete the density calculations practice

20. Density Calculation Practice
Complete the calculations at your desk. Calculations not completed in class will be completed for HW

21. Exit Ticket: Think about the densities of the following substances
Exit Ticket: Think about the densities of the following substances. Use the density to answer the following questions.
A. Lead B. Feathers

22. Which has a greater mass, 6.00 g of lead or 7.00 g of feathers?
A. Lead B. Feathers
feathers

23. Which occupies a greater volume, 5. 00 cm3 of lead or 5
Which occupies a greater volume, 5.00 cm3 of lead or 5.00 cm3 of feathers?
A. Lead B. Feathers
neither

24. Which occupies a greater volume, 5.00 g of lead or 5.00 g of feathers?
A. Lead B. Feathers
feathers

25. Which occupies a greater volume, 9.00 g of lead or 50.0 g of feathers?
A. Lead B. Feathers
feathers

26. Which occupies a greater volume, 50.0 g of lead or 9.00 g of feathers?
A. Lead B. Feathers
Not enough information to determine