1. Comparing Densities of Different Solids

2. Using Data to make predictions and conclusions
Material
Density
Wax
0.86 g/mL
White Plastic
0.97 g/mL
Water
1.0 g/mL
Acrylic (transparent plastic)
1.21 g/mL
Aluminum (shiny metal)
2.88 g/mL
Density Averages from all classes
Fill in the Density Column on the worksheet
Fill in the Prediction Column on the worksheet
Answer #2 – How did you decide what would sink or float in water?

3. Observations Fill in the observation Column Answer #4 Wax
White plastic
Wax
Acrylic
Aluminum

4. Isopropyl Extension Use this data to: fill in the blanks on # 5
Make a prediction about whether the wax and clay will float or sink in isopropyl
Material
Density (g/mL)
Isopropyl
0.85 g/mL
Wax
0.86 g/mL
Clay
1.87 g/mL

5. Isopropyl Extension Fill in the observation “beaker”
Think about why the wax floated in water and sank in isopropyl…
What do you need to know other than the density of the wax in order to predict if it will float or sink in a liquid? (#6)
Isopropyl
Wax
Clay

6. Models - Water Filled in #7 together as a class
Clay = most dense  most dots
Wax = least dense  least dots

7. Model – Isopropyl (#8)
Use the water as a guide to fill in the model for the isopropyl
Fill in #9.