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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
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