“Mass Communication”

[Mass & Volume]

(1) What’s Our Purpose Today?

• Measure the mass and volume of matter.

• Compare the mass and volume of different substances.

• Better understand the components of matter.

(2) BIG Questions for Today:

1. What is matter?

2. What is mass?

3. What is volume?

(3) What Are We Going To Do?

• Go to Lab 113.• Work in Pairs (Groups of 2).

• Follow procedure on worksheet + record data.

• Work on “Analysis” in groups when finished.

• Discuss answers as a whole group at very end!

(4) Behavior Reminders:

1. Silent in the hallways.

2. Follow teacher, do not wander.

3. Stay at entrance way of lab + Wait for Directions.

4. Listen to Rozema.

55 Any minor horseplay, joking around, etc. will be automatic SRC referrals. (Please do not make me do this, it sucks!)

(Procedure)(#1) Predictions

Which rods / crayon did you think would have…..

•The Greatest Mass?? Why did you think that?

•The Greatest Volume?? Why did you think that?

•The Least Mass?? Why did you think that?

•The Least Volume?? Why did you think that?

(Procedure)(#2) Data:

Object Mass(g)

Volume of Water w/o

Object (mL)

Volume of Water

w/Object (mL)

Volume of Object

5cm—long gold-colored rod

55.5g ~30mL ~36.6mL ?

5cm—long silver-colored rod

17.8g ~30mL ~36.6mL ?

10cm—long silver-colored rod

35.6g ~30mL ~43.2mL ?

crayon 3.2g ~30mL ~43.3mL ?

(Procedure)(#3) Calculate the Volume of

each Object:

• How did you do this?

Volume of Waterw/Object (mL)

Volume of Waterw/o Object (mL)

Volume of Object (mL)- =

(Procedure)(#2) Data:

Object Mass(g)

Volume of Water w/o

Object (mL)

Volume of Water

w/Object (mL)

Volume of Object

5cm—long gold-colored rod

55.5g ~20mL ~26.6mL 26.6 - 20 = 6.6mL

5cm—long silver-colored rod

17.8g ~20mL ~26.6mL 26.6 – 20 = 6.6mL

10cm—long silver-colored rod

35.6g ~20mL ~33.2mL 33.2 – 20 =

13.2mL

crayon 3.2g ~20mL ~33.3mL 33.3 – 20 = 13.3mL

(Analysis)(#1) How did you find the volume

of the objects?

• Subtracted 2 volumes

• Found the difference between 2 volumes

• Measured volume of water, and then water w/object inside

(Analysis)(#2) Which object had the greatest

mass?

• Greatest Mass? 5cm Gold Rod

• Least Mass? Crayon

• Did this match your predictions / inferences?

(Analysis)(#3) Which object has the smallest

volume?

• Smallest Volume? 5 cm Rods

• Greatest Volume? 10 cm Rod

• Did this match your predictions / inferences?

(Analysis)(#4) How did the volumes of the 5cm gold + silver rods compare?

• Volumes were the same.

• Gold-Colored rod had greater mass, than silver-colored rod.

(Analysis)(#5) How did the volume of the 5cm silver rod compare to the

10cm one? • 10cm = greater volume, than 5cm rod.

• Mass of 10cm rod was also greater!

(Analysis)(#6) Which has more matter, 5cm

gold or 10cm silver rod?

• Because they were the same material…

• But different volumes…

• And different masses…

• We can “assume” or “infer” that:The 10cm silver rod had more matter than the 5cm silver rod.

(Analysis)(#7) How can objects of the same

size have different mass?

• Made of different types of matter (or substances).

(Making Sense)(#8) Do 2 objects w/the same mass

always have the same volume?

• No.

• If they are made of different matter…

• One type may be “heavier” than the other”

You do NOT have to write any of this down. BUT,

pay attention!

(1) We Should Have…

• Measured the mass and volume of matter.

• Compared the mass and volume of different substances.

• Better understood the components of matter.

(2) You Should Be Able to Answer These…..

[WRITE THESE DOWN AT BOTTOM OF WORKSHEET!!!]

• What is matter?Anything with mass and volume.

• What is mass?How heavy the matter is, measured in grams.

• What is volume?The amount of space matter takes up, measured in milliliters.

(3) Connecting to “Penny” Lab…

• How could we have used mass and volume measurements to determine if we made real gold in that lab? Explain.

(4) Do you think any of the objects today were the same

type of matter?• The silver rods…

• Looked the same, but we don’t really know FOR SURE.

• THIS IS AN INFERENCE / ASSUMPTION!

(4) What are the units for mass and volume?

• Mass Units Grams (g)

• Volume Units Milliliters (mL)

(4) What are the units for mass and volume?

• Mass Units Grams (g)

• Volume Units Milliliters (mL)