Transcript
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.
A B
A and B = SAME VOLUME (same size)
A B
A and B = SAME VOLUME (same size)
A B
A and B = DIFFERENT MASS (amount of particles; different substance)
Different Densities
C D
C and D = DIFFERENT VOLUME (different size) but same substance
C D
C and D = DIFFERENT VOLUME (different size) but same substance
Same Densities-
particles are packed the
same way
1. Go to: Learning Point
2. Select: Feb. 27th – Mar. 2nd
3. Select: SAS Curriculum #11 hyperlink
4. Type in: eagles
Object # Mass(g)
Initial Volume
(mL)
Final Volume
(mL)
Object Volume
(mL) 1
5
2
5
3
5
4
5
Table 1: Data for objects 1-4
Subtract Final Volume from Initial
Volume
Subtract Final from Initial
Object #
Mass (g)
Initial Volum
e (mL)
Final Volume
(mL)
Object
Volume
(mL)
Density(g/mL)
RESULTS(S= sink; F=floats)
Water Ethano
Gasoline
Sea H2O
5
6
7
8
9
10
11
Table 2: Data for Objects 5-11
Divide Mass by Object Volume
Subtract Final from Initial
Substance Density(g/mL)
aluminum 2.7copper 8.9
gasoline 0.68gold 19.3ice 0.917iron 7.8lead 11.3
seawater 1.025wood (average value) 0.8
Table of Densities
Subtract Final from Initial
Liquid Color of
Liquid
Volume (mL)
Mass (g) Density (g/mL)
1.Water Light Blue
5
2. Ethanol Dark Blue
5
3. Gasoline
Dark Green
5
4. Seawater
Light Green
5
Table 3: Liquid Densities
Mass divided by Volume = Density
1. Introduction to Density Due today sometime.
2. Have an enjoyable weekend!
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