µ GCSE | Density

10 quick questions - for GCSE or iGCSE

 

10 minutes maximum! (can you do it in 5?)

Grab a calculator - time for some maths!

Density is a measure of how compact the particles are in a substance.

 

 1. Which of these is the correct formula for density?

  • A. density = mass x volume
  • B. density = mass ÷ volume
  • C. density = volume ÷ mass
  • D. density = volume - mass

2. This metal cube of side 2cm has a mass of 32g.

The density is

  • A. 2 g/cm3
  • B. 4 g/cm3
  • C. 8 g/cm3
  • D. 16 g/cm3


3. If you heated the cube it would expand a little. This would make ....

  • A. ..the mass increase and therefore the density increase.
  • B. ..the mass increase and therefore the density decrease.
  • C. ..the volume increase and therefore the density decrease.
  • D. ..the volume increase and therefore the density increase.

 

Q 4-6. These questions are about the densities of different substances.

What are the missing values?

 
  Substance

Density (g/cm3)

Mass (g)
Volume (cm3)
4. Glass
9
6
5. Lead
11.3
200
6. Wood
0.8
80

 

7. Floating or sinking depends on density.

The density of water is 1 g/cm3.

The density of this block is is 1.1 g/cm3.

 

This means that if you put this cube in water it will...

  • A. .. float because it has a density higher than 1 g/cm3.
  • B. .. float because it has a density lower than 1 g/cm3.
  • C. .. sink because it has a density higher than 1 g/cm3.
  • D. .. sink because it has a density lower than 1 g/cm3.

Q8-10.

A green ball has been put into the measuring cylinder shown, and the water level has risen.

 

 

 

 

 

 

 

 

8. The water has been...

  • A. dispersed.
  • B. displaced.
  • C. diffracted.
  • D. diffused.
9. The density of the ball is:
  • A. 0.47 g/cm3
  • B. 3.50 g/cm3
  • C. 0.91 g/cm3
  • D. 1.10 g/cm3

10. If the ball is cut in half and the experiment repeated, the density will .