Properties and uses of some metals
3 marks · EasyThe table shows properties of two metals.
| Metal | Density (g/cm³) | Main Use |
|---|---|---|
| Aluminium | 2.7 | Aircraft bodies |
| Copper | 8.9 | Electrical wiring |
Which metal in the table has the lower density?
State the main use of copper shown in the table.
Suggest why aluminium is used in aircraft bodies instead of copper.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) Aluminium
(b) Electrical wiring
(c) Aluminium is used because it is less dense (lighter) than copper.
Common mistakes: Main use of copper: cooking pans (not from data)
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Identifies aluminium has the lower density.
B2 (b) · 1 mark · Identifies the main use of copper as electrical wiring.
B3 (c) · 1 mark · Suggests aluminium is used in aircraft bodies because it is lighter or less dense than copper.
Worked solution
a) Aluminium b) Electrical wiring c) Aluminium is used as it is lighter (lower density) than copper, making it better for aircraft.