› Warm up: complete this on your Activity 8 notes page!

› Do you think that gas has volume? Why or why not?

Activity 8: Measuring Volume

› What are the two ways to measure volume?

› How would you measure the volume of:– A nail– A tennis ball– A pizza box

Activity 8: Measuring Volume

› What is the volume of a cylinder with a diameter of 6 cm and a height of 3 cm?

Activity 8Measuring Volume

› What is the volume of the irregular shaped object?

Activity 8Measuring Volume

› With your group, wrap up measuring the cubes, cylinders, and bars in your box.

› Record your data in Student Sheet 8.1b.

Activity 8Measuring Volume

Class ComparisonObject Method

UsedMeasurements Formula and Calculations Volume

Light gray bar

   

     

Dark gray bar

   

     

Light gray cube

   

     

Dark gray cube

   

     

Light gray cylinder

   

     

Dark gray cylinder

› Quantitative-

› Qualitative-

Quantitative vs Qualitative

› What is the final ranking of the objects? List the objects from least to greatest.

Ranking of Objects

List 1 List 2 List 3

150 mL 2 mL 1 L

11 mL 801 mL 999 mL

200 mL 27 cm3 998 cm3

Activity 8 Analysis Questions

Cross out the smallest and circle the largest in each list.

› Volume- a measure of how much space something takes up.

› There are two ways to measure volume:– Measurement and calculation- plug and chug based

on your formulas. Lxwxh or h

– Water displacement- final volume- initial volume= volume of object

› 1 mL = 1 cm3

Activity 8In Case You Missed It…

› Quantitative observations use measurements.– Ex: the cube has a length of 4 cm. The monkey has a

mass of 140 g.

› Qualitative observations do not use measurements.– Ex: the cube is silver. The monkey is purple.

Activity 8In Case You Missed It…

› Please open your books to page A36.

Activity 9:Measuring Mass and Calculating Density

› How do you define mass?

› How do you define weight? Is it different than mass?

Activity 9:Measuring Mass, Calculating Density

› What is the formula for density?

› Today, you are going to measure the mass of the metal objects.

› Make sure the scale is zeroed!

› Record data on Student Sheet 9.

Activity 9:Measuring Mass, Calculating Density

› Use the mass and the volume from Activity 8 to calculate the density of the cube, bar, and cylinder.

› Then, use your calculations and Table 3 (on Student Sheet 9) to determine the identity of the objects.

Activity 9:Measuring Mass, Calculating Density

Object Mass (g) Volume (cm3 or mL)

Density Calculation

Density (g/cm3 or g/mL)

Light gray bar

Dark gray bar

Light gray cube

Dark gray cube

Light gray cylinder

Dark gray cylinder

Class Comparison

Object Density Calculated Closest Density from Table 3

Object’s Material

Light gray bar

Dark gray bar

Light gray cube

Dark gray cube

Light gray cylinder

Dark gray cylinder

Class Comparison

› Does the density of an object change if its size changes?

– If a piece of clay has 10 g of mass and a volume of 5 cm3

what is the density of the clay?

– What if you cut it in half? What is the density of the 2 half pieces of clay?

More About Density

› On your own, with a partner, or with your group, work on Analysis Questions 1-3.

› Question 3e is a UC assessment!

› The scoring guide is in the OneNote Content Library

› All questions should be answered in OneNote on the Activity 9 Analysis Questions page!

Activity 9 Analysis Questions

› OneNote Content Library- go there!

› COMPLETE IN ONENOTE

› Worth 40 points.

› Prompt: How do the densities of the new pieces compare with the density of the original block? Use your answer to question 3 and a diagram to illustrate your answer.

› Due: Friday

Activity 9 UC Assessment