introduction to density spring 2012
TRANSCRIPT
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1. The metric unit for mass is?2. Which form of matter has particles that
are free to move independently and collide frequently?
3. Which variable is usually is represented by the x-axis in a data table?
4. Give 2 unit labels for volume.5. Physical changes to matter do not
change what?
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6. When CO2(s) changes state directly into a gas without becoming a liquid, we call this______________.
7. Which form of matter has both crystalline and amorphous structures?
8. Plant leaves lose water through evaporation – physical or chemical? Why?
9. Proteins are made from amino acids – physical or chemical? Why?
10. Food is digested – physical or chemical?11. Which Law states that Mass can neither be
created or destroyed?
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10. What method would you use to find the volume of a block of wood?
11. What are 3 equivalent formulas for finding the volume of a cube?
12. What are the 3 equivalent units of measurement for volume of an object?
13. When will a substance float in water?14.What is the vocabulary word for
finding the volume of an irregularly shaped object?
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A substance’s density is the measure of the mass of material within a certain volume. (amnt of space taken up)
The mass (amnt of particles) is affected by how tightly packed the molecules are within the space.
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A B
A and B = SAME VOLUME (same size)
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A B
A and B = SAME VOLUME (same size)
A B
A and B = DIFFERENT MASS (amount of particles; different substance)
Different Densities
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C D
C and D = DIFFERENT VOLUME (different size) but same substance
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C D
C and D = DIFFERENT VOLUME (different size) but same substance
Same Densities-
particles are packed the
same way
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1. VOLUME – amount of space• mL, cm3, cc
2. DENSITY – how the particles are packed- RATIO• g/mL , g/cm3, g/cc, kg/m3
3. MASS – amount of particles• Any gram unit
Turn to the back of your handout – blank page
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Sample Chemical Symbol
Density g/cm3
Physical Attribute
Lead Pb 11.3 Heaviest Mass
Copper Cu 8.9 OrangeIron Fe 7.9 Magnetic/
RustsBrass Cu & Zn 8.6 Yellow
Aluminum
Al 2.7 Lightest Mass
Zinc Zn 7.1 Dull Gray
You will need this chart to ID substances.
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Substance Mass (g)
Volume (cm3)
Density(g/cm3)
4. Cube 1= _________ 5. Cube 2 = _________6. Cube 3 = _________7. Cube 4 = _________
8. Cube 5 = _________9. Cube 6 = _________
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Sample Chemical Symbol
Density g/cm3
Physical Attribute
Lead Pb 11.3 Heaviest Mass
Copper Cu 8.9 OrangeIron Fe 7.9 Magnetic/
RustsBrass Cu & Zn 8.6 Yellow
Aluminum
Al 2.7 Lightest Mass
Zinc Zn 7.1 Dull Gray
Copy chart onto Cornell Notes
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1. THINK about the concepts of VOLUME, DENSITY and MASS.
2. Circle same or different.3. Explain WHY.
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1. THINK about the concepts of VOLUME, DENSITY and MASS.
2. Circle same or different.3. Explain WHY.
#5. Objects A and B have the same or different densities because
Iron Iron
A B
They are the same substance & the particles are packed the same way
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1. Identify the type of numbers you have. (unit labels)
2. Understand what the problem is asking.
3. It is a one step problem or two step problem?
4. Which formula should you use?
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The following formulas are for finding different variables in density problems.
m mv D= =
= D vxm
D v
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1. Identifying Volume Lab – Due Some Time Today
2. Introduction to Density due Tomorrow.