Available practice: 75 of 80 marks. Parts 8(b), 10(d) await marking support. Scores cover available parts only.
A piece of metal has an irregular shape. The weight of the metal is 3.0 N.
(a)Calculate the mass of the metal. (Take the weight of 1.0 kg to be 9.8 N.)
Answer guidance
Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.
[2 marks]
A piece of metal has an irregular shape. Fig. 2.1 shows the piece of metal, a measuring cylinder and a beaker containing water.
(b)(i)Describe how to determine the volume of the piece of metal, using the equipment in Fig. 2.1.
Answer guidance
Describe Say what happens, in order. Reasons are not required unless the question also asks why.
[4 marks]
A method of finding the volume of an irregularly shaped piece of metal uses a measuring cylinder and a beaker of water (displacement of water).
(b)(ii)Explain why this procedure is not suitable for finding the volume of a piece of low-density wood that is a similar shape and size to the piece of metal.
Answer guidance
Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.
[1 mark]
The mass of another piece of metal is 405 g and its volume is 150 cm³.
(b)(iii)Calculate the density of this piece of metal, in g/cm³.
Answer guidance
Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.
