Materials: Density


(a) Barry wanted to determine the density of a small piece of rock.

Describe how Barry could measure the volume of the piece of rock.

[4 marks]

(b) The volume of the piece of rock was 18.0 cm3.

Barry measured the mass of the piece of rock as 48.6 g.

Calculate the density of the rock.

[3 marks]

(c) The bar chart shows the densities of different types of rock.

What type is the rock Barry investigate most likely to be?

[1 mark]


(i) Suggest one source of error that may have occurred when the student measured the volume of the rock.

[1 mark]

(ii) How would the error you described affect the measured volume of the rock?

[1 mark]

[Total: 10 marks]