The table below shows the energy requirements (in kilojoules) for males at different ages and different levels of activity:
| Age (years) | Energy requirement for Sedentary level (kJ) | Energy requirement for Active level (kJ) |
|---|---|---|
| 4 | 5000 | 6000 |
| 8 | 6100 | 7800 |
| 12 | 7800 | 9500 |
| 17 | 10200 | 11400 |
| 30 | 11000 | 12600 |
| 45 | 10200 | 11400 |
| 60 | 8900 | 10200 |
State the labels (with units) that should be used on the horizontal and vertical axes of a line graph representing this data, and how the two sets of data should be distinguished.
Describe how increasing age affects the energy requirements of males.
Explain the effect that the level of activity has on the energy requirements of males.
65 exam-style questions on Edexcel IGCSE Biology Nutrition. Each one has a worked solution and a mark scheme showing where the marks go.