Density
Lithium
 |
| Protons: 3 Neutrons: 3 Electrons: 3 Density: .534 grams per cubic cm. |
 |
| Protons: 5 Neutrons: 5 Electrons: 5 Density: 2.37 grams per cubic cm. |
Density = Mass/Volume
Student Guide for Density
Simulation: Name: Emily Minniecheske
(note: “sink”
means stays on the bottom)
|
Start: 1.
2. Click on the first link
3. Click on the 
button
button
4.
Experiment
with choosing a material:
material
|
S=sinker
F=Floater
|
Density given
|
Styrofoam
|
F
|
.89 kg
|
Wood
|
F
|
2.62 kg
|
Brick
|
S
|
6.01 kg
|
Ice
|
F
|
13.08 kg
|
Aluminum
|
S
|
17.66 kg
|
|
5. Try to
get aluminum to float. Talk with
your partner about this possibility- can you change the mass of the
aluminum block without changing the volume of the aluminum block? No, the volume changes as the mass changes.
6.
What do you and your partner notice about the density triangle at the bottom of the
box? Why do you think this does or does
not move? It does not move
because that is the density of aluminum will still remain the same no matter
what.
7. How does the density of aluminum (2.70 kg/L) help explain what you see? The mass divided by volume will
always equal 2.70 kg/L when dealing with aluminum.
Frame: The aluminum will ______sink_________ in the water
because the density of the aluminum is ___2.70 ____kg/L and the density of water is ___1.00______kg/L_. We have learned that __the mass and volume can change but
the density will not.
8.
Density =
---------- “_mass____ over ___volume___ equals ____density___________”
In the
“Blocks” box, click on Mystery:
|
When you
have determined which ones sink and float, fill
in the data table for each box.
Sample
|
Starting volume of water (A)
|
volume of water and block (B)
|
Volume of block alone
(difference B-A)
|
Mass (kg)
|
Density (kg/L)
|
What is it most likely made of? (hint: use Show Table for help)
|
A
|
100-L
|
103.38 L
|
3.38 L
|
65.14 kg
|
19.22 kg/L
|
gold
|
B
|
100-L
|
100.64 L
|
.64 L
|
0.64 kg
|
1 kg/L
|
Water
|
C
|
100-L
|
104.08 L
|
4.08 L
|
4.08 kg
|
1 kg/L
|
Water
|
D
|
100-L
|
103.10 L
|
3.10 L
|
3.10 kg
|
1 kg/L
|
Water
|
E
|
100-L
|
101.00 L
|
1.00 L
|
3.53 kg
|
3.53 kg/L
|
diamond
|
9. Look closely at green box C and red
box D and discuss your observations.
List three observations you made while
comparing the two boxes.
1st observation
C floats higher
|
2nd observation
C is bigger
|
3rd observation
C weighs more
|
10. Dear
Students,
I am going
to build a boat. My partner says I cannot
put a refrigerator and a television in my boat because that would make it too
heavy-and the boat might sink. Then we would be swimming with the sharks!!!!
What
would you advise me to tell my friend? Is she right or wrong? Be sure to give me some evidence based on
what you learned from the boxes or
other places in this activity.
If the boat is big
enough it would be able to hold the refrigerator and television.
_________________________________________________________________
A.4.3: When investigating a
science-related problem, decide what data can be collected to determine the
most useful explanations
A.4.4: When studying
science-related problems, decide which of the science themes are important
C.4.5: Use data they have collected
to develop explanations and answer questions generated by investigations
C.4.6: Communicate the results of
their investigations in ways their audiences will understand by using charts,
graphs, drawings, written descriptions, and various other means, to display
their answers
D.4.1: Understand that objects are
made of more than one substance, by observing, describing and measuring the
properties of earth materials, including properties of size, weight, shape,
color, temperature, and the ability to react with other substances
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