POM - 3 Predicting Density•What makes things float and sink?

•Coke Can Demonstration - (make predictions, observations and your own explanations).

PS - How can the density be used to predict whether something will float or sink (buoyancy)?

Hyp - If an object’s density is higher then (your prediction) because (your reason).

Variables - (Identify the MV and RV)

Floating and Sinking Test

(Place Table 1 in your journal.)

(Copy the densities of the 7 objects from your data in POM-2.)

(Test our hypothesis by put each object in water.)

ProceduresRead p 26 steps 4-15 then summarize these

steps into your journal. Remember procedures need to:

• Be written in steps that are clear and detailed enough for someone else to do the investigation without you.

• Remind us to record your measurements• Include repeated trials (at least 3 times) or in

this case comply our class data and take an average.

Procedures1. Measure 25 ml of vegetable oil and measure

the mass. Calculate the density. Record density.

2. Repeat #1 with corn syrup.

3. Pour vegetable oil and 25 ml of water into the corn syrup cylinder.

4. Drop copper cylinder then the nylon spacer into the column.

5. Clean - pour the liquids into the waste container.;

Conclusion

• Answer the problem statement.

• Support this specific data (number and observations)

• Explain how your data supports your conclusion.

Grading• Table of Contents (1 pt)• Title (1 pt)• Why do things float? (1 pt)• Demo Observations (1 pt)• Problem Statement (1 pt)• Hypothesis (2 pts)• Procedures (2 pts)• Data (3 pts)• Conclusion (3 pts)