8. The table shows the recommended daily intake of energy and some of the nutrients needed by different groups of people. (a) (i) Explain why two 16 year-old males of the same weight might need different amounts of energy.

1 mark

(ii) Which two types of nutrient provide most of the energy in our diet?

1.

2.

2 marks

(b) (i) Calculate the difference in the recommended daily intake of calcium for a 15 year-old male and a 30 year-old male.

mg

1 mark

(ii) Calcium is needed for healthy bones. Explain the difference in the amount of calcium needed each day by a 15 year-old male and a 30 year-old male.

1 mark

(c) Predict how the energy requirement for males over 50 compares to males under 50? Explain your answer.

1 mark

(d) Why is iron an important nutrient?

1 mark

Maximum 7 marks