Take Out

• Planner• Catalyst sheet• Science notebook• Pencil

1. What was your hypothesis for the Calculated Density lab? Write it down on your Catalyst sheet.

2. Look at your graph. What relationship between the IV and DV do you think is represented on your graph? A positive, negative, or no relationship? How do you know this?

3. Based on the data in your data table and your graph, was your hypothesis supported or rejected? Explain.

Catalyst

What relationship exists between the variables?

• Positive relationship

• Negative relationship

• No relationship

Conclusion

• What is the purpose of your Conclusion?

Conclusion must haves!

• Restates the question in the form of a statement.

• Restates the hypothesis.• Tells whether the hypothesis was supported or

rejected.• Uses data from the data table and/or graph as

evidence for support.• Ends with a summary statement.• Is written in paragraph form.

Homework

• Write a final draft of your Observations• Finish the final copy of your Graph• Write a rough draft of your Conclusion in your

science notebook• Use the rubric as a guide!

Take Out

• Planner• Catalyst sheet• Science notebook open to rough draft of

Conclusion• Pencil

Below are the “accepted” densities for the liquids you tested in class. Copy these down onto your Catalyst sheet, and then answer the following questions:

Corn Syrup – 1.38 g/mLSalt Water – 1.05 g/mLLiquid Water – 1.00 g/mLRubbing Alcohol – 0.79 g/mL

1. What do you think is meant by the term “accepted density”?2. How do your densities compare to these accepted densities?

Catalyst

Conclusion

• You should have a rough draft of your Conclusion written in your science notebook

• Your next homework assignment will be to create a final copy of this Conclusion

Inference

• What is the purpose of the Inference of a lab report?

Inference must haves

• I would suggest starting the Inference with your problem statement again, just like the Conclusion

• Explain results using key terms (mass, volume, density, accepted density? relative density?)

• Propose a possible source of error• Suggest a way to eliminate the source of error

Homework

• Write a rough draft of Inference in science notebook

• Create final copy of Conclusion• Final lab (Observations, Graph, Conclusion,

Inference) due

Take Out

• Planner• Catalyst sheet• Science notebook• Final Lab Report (Don’t staple yet)• Rubric• Pencil

1. Define mass. How is mass found?2. Define volume. How is volume

found?3. Define relative density. How is

relative density found?4. Define calculated density. How is

calculated density found?

Catalyst

Page - Volume, Mass, & Density Notes

Mass

• The amount of matter an object is made of

• The amount of stuff an object is made of

• Mass is found using a triple beam balance

• Mass is measured in grams

Volume

• The amount of space an object occupies

• Volume can be found using an overflow container, or using a tool such as a graduated cylinder

• Volume can also be found using a formula

Volume

Length X Width X Thickness = Volume

7 cm 3 cm 1 cm

5 cm 2 cm 2 cm

4 cm 5 cm 3 cm

6 cm 5 cm 4 cm

Relative Density

• Density is the amount of stuff (mass) in a certain amount of space (volume)

• Relative density describes a substance’s density compared to another substance

Calculated Density

• Mass ÷ Volume = Calculated Density

• Measured in g/mL or g/cm3

• The same definition of density is still true: Density is the amount of stuff (mass) in a certain space (volume)

Complete the calculation in your notes

Object A

Mass= 50 g

Length = 2 cmWidth = 1 cmThickness = 5 cmVolume =

Calculated Density =

Homework

• Complete the Mass, Volume, and Density worksheet

Take Out

• Planner• Catalyst sheet• Science notebook• Completed Volume, Mass, and Density

worksheet• Pencil

Calculate the densities of the following objects:

Catalyst

Object A

Mass= 1000 g

Length = 10 cmWidth = 10 cmThickness = 10 cmVolume =

Calculated Density =

Object B

Mass= 0.4 g

Length = 0.2 cmWidth = 1 cmThickness = 1 cmVolume =

Calculated Density =