4400 Higher June 2006 Paper 3 Q1
1 The surface area of the Earth is 510 million km².
The surface area of the Pacific Ocean is 180 million km².
(a) Express 180 million as a percentage of 510 million.
Give your answer correct to 2 significant figures. (2)
Give your answer correct to 2 significant figures. (2)
The surface area of the Arctic Ocean is 14 million km².
The surface area of the Southern Ocean is 35 million km².
(b) Find the ratio of the surface area of the Arctic Ocean to the surface area of the Southern Ocean.
Give your ratio in the form 1 : \(n\). (2)
Give your ratio in the form 1 : \(n\). (2)
| Scheme | Marks |
|---|---|
| \(\dfrac{180}{510} \times 100\) | M1 |
| 35 | A1 |
| (2) |
Notes
M1: for \(\dfrac{180}{510}\) or 0.35…
A1: for 2 sf or better (35.2941…)
| Scheme | Marks |
|---|---|
| \(\dfrac{35}{14}\) | M1 |
| 2.5 | A1 |
| (2) | |
| (4 marks) |
Notes
M1: for \(\dfrac{35}{14}\)
SC Award M1 for 0.4 oe or for 2 : 5
A1: for 2.5 or \(2\frac{1}{2}\) or \(\frac{5}{2}\)