Density

Question 1

What is density?

Answer 1

It is the amount of mass per unit area and it’s how tightly packed together matter is.

Question 2

What is the equation for density?

Answer 2

Density = mass ➗ volume 
P = m ➗ v
Density = kg/m3
Mass = kg
Volume = m3

Question 3

How do you find the density of a regular shaped object eg block of wood or iron or aluminium?

Answer 3

Use a ruler, top pan balance, a calculator and a selection of materials
Conclusion is that density is particular to the material not the size

Question 4

How do you find the density of an irregular shaped object?

Answer 4

1. Use a displacement can, small beaker, measuring cylinder, irregular shaped object and a top pan balance
2. Measure V1-volume and mass of water measured in a small beaker, weighed on the top pan balance
3. Add object then measure V2-volume and mass of irregular shaped object in water in small beaker
4. Density is difference between V2 and V1

Question 5

How do you find the density of a liquid?

Answer 5

1. You need a measuring cylinder and top pan balance
2. Weigh empty measuring cylinder
3. Add certain volume of liquid and weigh new mass
4. Difference in mass and volume allows you to work out density