Answers to AQA GCSE Measuring Density

Practice Questions

1.State which of the three methods above you would use to measure the density of a matchbox.

Measuring density of a regular shape solid

2. State which method you would use above to measure the density of a crystal with sides of different length

Measuring density of an irregular shaped solid

3. Billy had a piece of wood which had an irregular shape. He wanted to calculate its density. So, he used the method for an irregular shaped solid. However, his teacher said that his results were not correct. Suggest a reason why his results were not correct. 

Wood has a low density, so it would float  in the water, rather than sink. Therefore, it would not displace a volume of water equal to its own volume. This means that the volume obtained will be smaller than the true volume. If the volume is smaller, then the density would be higher.