Density

1. Density

2. Density
Density: is the amount of matter
in a given volume.
This mass to volume
relationship allows us to
compare how "heavy or light"
different substances are.

3. Density
**Recall from PMOM: All substances are made of different
particles.
Therefore the density of a fluid depends on the particles it is
made of.
Notice D has different particles than the other 3.
Also notice A & C have the same number of particles/mass but C has more room/volume so A is
more dense

4. Calculating Density
Calculating Density
Density is the mass per unit of volume.
Copy these formulas:
The units of density are (copy solid & liquid units):

5. Calculating Density
The 5 steps to problem solving in science are:
1. Formula
2. Knowns and Unknowns
3. Work
4. Answer
5. Units
So each question is out of 5 marks!

6. Calculating Density

7. Calculating Density
Calculate the density of water
(remember the 5 steps to solving a problem).
1. Formula: 𝐝𝐞𝐧𝐬𝐢𝐭𝐲 =
𝒎𝒂𝒔𝒔
𝒗𝒐𝒍𝒖𝒎𝒆
2. Knowns and Unknowns
𝑲𝒏𝒐𝒘𝒏 = 𝒎𝒂𝒔𝒔 & 𝒗𝒐𝒍𝒖𝒎𝒆
𝑼𝒏𝒌𝒏𝒐𝒘𝒏 = 𝒅𝒆𝒏𝒔𝒊𝒕𝒚
3. Work (find easy points on graph)
𝐝𝐞𝐧𝐬𝐢𝐭𝐲 =
𝟔𝟎 𝒈
𝟔𝟎𝒎𝒍
4/5. Answer & Units 𝐝𝐞𝐧𝐬𝐢𝐭𝐲 = 𝟏 𝒈/𝒎𝒍

8. Calculating Density
Calculate the density of aluminum
(remember the 5 steps to solving a problem).
1. Formula: 𝐝𝐞𝐧𝐬𝐢𝐭𝐲 =
𝒎𝒂𝒔𝒔
𝒗𝒐𝒍𝒖𝒎𝒆
2. Knowns and Unknowns
𝑲𝒏𝒐𝒘𝒏 = 𝒎𝒂𝒔𝒔 & 𝒗𝒐𝒍𝒖𝒎𝒆
𝑼𝒏𝒌𝒏𝒐𝒘𝒏 = 𝒅𝒆𝒏𝒔𝒊𝒕𝒚
3. Work (find easy points on graph)
𝐝𝐞𝐧𝐬𝐢𝐭𝐲 =
𝟖𝟎 𝒈
𝟑𝟎𝒎𝒍
4/5. Answer & Units 𝐝𝐞𝐧𝐬𝐢𝐭𝐲 = 𝟐. 𝟕 𝒈/𝒎𝒍