10 minutes maximum! Can you do it in 5?

 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

Q2+3:

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

 metal cube

2. 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)
Glass 9 6
Lead 11.3 200
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.

 

 

 wooden cube
This means that if you put this block 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.

  
2 x measuring cylinders used to measure density

8. The water has been...

  • A. dispersed.
  • B. displaced.
  • C. diffracted.
  • D. diffused.
9. Using measurements from the diagram above, what is the density of the ball?
  • 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   .