Science 8 · Unit 7: Diet and growth · Cambridge Lower Secondary Science Stage 8

Questions

1. 1. Why do we need fibre in our diet?

   • It gives most of our energy.
   • It helps food move through the digestive system and prevents constipation.
   • It carries oxygen.
   • It builds muscles.
   Check

2. 2. Look at the table. Which kinds of food contain no fibre?

   • animal foods like chicken, eggs, fish and mutton
   • fruits and vegetables
   • bread and rice
   • beans and peas
   Check

3. 3. Look at the table. Which food has the most fibre per 100 g?

   • coconut
   • bread, brown
   • beans
   • spinach
   Check

4. 4. Look at the table. Which has more fibre, brown or white bread?

   • brown bread
   • white bread
   Check

5. 5. Rice has 3 g fibre and spinach 6 g per 100 g; chicken has 0. How much fibre is in 200 g chicken, 200 g rice and 100 g spinach?

   • 15 g
   • 6 g
   • 9 g
   • 12 g
   Check

6. 6. Which two nutrients provide most of the body's energy?

   • vitamins and minerals
   • calcium and iron
   • water and fibre
   • carbohydrate and fat
   Check

7. 7. A man regularly eats more energy than he uses. What happens?

   • He gains weight, because the extra is stored as fat.
   • He grows taller.
   • He loses weight.
   • Nothing changes.
   Check

8. 8. What happens if you eat less energy than your cells need?

   • Cells stop working at once.
   • The body breaks down fat stores and you lose weight.
   • You gain weight.
   • You grow faster.
   Check

9. 9. Why does a teenage boy need more energy than an eight-year-old boy?

   • He sleeps more.
   • He is bigger and growing fast.
   • He eats less.
   • He is smaller.
   Check

10. 10. Why does an adult woman generally need less energy than an adult man?

    • Men eat less.
    • Women are always less active.
    • On average she has a smaller body and less muscle.
    • Women don't respire.
    Check

11. 11. Who needs more energy - an active person or someone who sits most of the day?

    • the active person
    • the person who sits
    Check

12. 12. What is a balanced diet?

    • a diet with all nutrients in the right proportions
    • avoiding all fat
    • eating only one food
    • eating as much as possible
    Check

13. 13. What unit is daily energy requirement measured in?

    • megajoules (MJ)
    • kilograms (kg)
    • newtons (N)
    • litres (l)
    Check

14. 14. Which meal is most balanced for an eight-year-old?

    • plain white bread only
    • sweets and juice
    • chips and cola
    • rice, chicken, spinach, an orange and water
    Check

15. 15. Where is extra fat mainly stored in the body?

    • in the brain
    • just below the skin
    • in the bones
    • in the blood only
    Check

16. 16. Fibre is not counted as a nutrient. Why?

    • It is a kind of vitamin.
    • It is only found in meat.
    • It can't be digested, so it doesn't reach the blood or cells.
    • It has too much energy.
    Check

17. 17. What is most fibre made of?

    • fat
    • protein
    • cellulose
    • calcium
    Check

18. 18. Why does a pregnant woman need plenty of iron in her diet?

    • to make haemoglobin for her own and her baby's blood
    • to make her bones lighter
    • to prevent constipation
    • to give her energy
    Check

19. 19. Which problems can eating too much sugar cause?

    • anaemia and constipation
    • scurvy and rickets
    • tooth decay and a higher risk of diabetes
    • weak bones and poor eyesight
    Check