Basics
Density refers to how tightly packed a particular object is.
In the above image, the brick has higher density than the sponge.
You should be given the following formula:
Density =
Question
A block of wood has a mass of 30 g and a volume of 10 cm³.
What is its density?
Answer
3 g/cm³
Answer Process
See PlugIn.
Mass = 30 g
Volume = 10 cm³
Density =
Density = = 3
Input  Display  Comment 
blinker  clears screen  
30 10  Density = Plug in 30 for Mass. Plug in 10 for Volume. 

3  Answer  
Density 
Question
Five blocks of wood have the following properties:
Block 1: Mass = 30 g; Volume = 10 cm³.
Block 2: Mass = 28 g; Volume = 4 cm³.
Block 3: Mass = 26 g; Volume = 13 cm³.
Block 4: Mass = 24 g; Volume = 8 cm³.
Block 5: Mass = 22 g; Volume = 11 cm³.
What is the mean (average) density of the five blocks of wood?
Answer
3.4 g/cm³
Answer Process
See PlugIn.
See Mean.
Density =
Mean =
Input  Display  Comment 
blinker  clears screen  
30 10  Density = Plug in 30 for Mass. Plug in 10 for Volume. 

3  Density Block 1  
28 4  Density = Plug in 28 for Mass. Plug in 4 for Volume. 

7  Density Block 2  
26 13  Density = Plug in 26 for Mass. Plug in 13 for Volume. 

2  Density Block 3  
24 8  Density = Plug in 24 for Mass. Plug in 8 for Volume. 

3  Density Block 4  
22 11  Density = Plug in 22 for Mass. Plug in 11 for Volume. 

2  Density Block 5  
3+7+2+3+2 5 
Mean =  
3.4  Answer  
Density

Practice – Questions
1. A block of wood has a mass of 35 g and a volume of 10 cm³. What is its density?
A. 1.5 g/cm³
B. 2.0 g/cm³
C. 2.5 g/cm³
D. 3.5 g/cm³
2. A block of wood has a mass of 24 g and a volume of 3 cm³. What is its density?
A. 4.5 g/cm³
B. 5.0 g/cm³
C. 8.0 g/cm³
D. 3.0 g/cm³
3. A block of wood has a mass of 66 g and a volume of 6 cm³. What is its density?
A. 11.0 g/cm³
B. 6.0 g/cm³
C. 10.0 g/cm³
D. 1.0 g/cm³
4. A block of wood has a mass of 108 g and a volume of 12 cm³. What is its density?
A. 12.0 g/cm³
B. 9.0 g/cm³
C. 8.0 g/cm³
D. 11.0 g/cm³
5. To the nearest hundredth, what is the mean (average) density of the above four blocks of wood?
A. 31.50 g/cm³
B. 31.51 g/cm³
C. 7.87 g/cm³
D. 7.88 g/cm³
Practice – Answers
1. D. 3.5 g/cm³
2. C. 8.0 g/cm³
3. A. 11.0 g/cm³
4. B. 9.0 g/cm³
5. D. 7.88 g/cm³
See Rounding.