The table below shows the daily energy requirements (in kilocalories, kcal) for females at different ages and different levels of physical activity:
| Age (years) | Energy requirement for Low Activity (kcal) | Energy requirement for High Activity (kcal) |
|---|---|---|
| 3 | 1000 | 1400 |
| 7 | 1300 | 1700 |
| 11 | 1700 | 2100 |
| 16 | 2100 | 2500 |
| 25 | 2200 | 2700 |
| 45 | 1900 | 2300 |
| 65 | 1600 | 2000 |
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 daily energy requirements of females.
Explain the effect that the level of activity has on the daily energy requirements of females.
65 exam-style questions on Edexcel IGCSE Biology Nutrition. Each one has a worked solution and a mark scheme showing where the marks go.