Grade 8Sciencequiz16 questions

Nutrients and a balanced diet

Grade 8: carbohydrates, proteins, fats, vitamins and minerals, fibre and water, deficiency diseases (scurvy), food tests (iodine for starch).

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Questions

  1. Which nutrient is the body's main source of energy?

    • Carbohydrates
    • Fibre
    • Minerals
    • Vitamins
    Show answerCarbohydrates

  2. Which food is a rich source of starch?

    • Butter
    • Egg white
    • Orange juice
    • Potatoes
    Show answerPotatoes

  3. What are proteins mainly needed for?

    • Cleaning the blood
    • Dissolving food
    • Growth and repair
    • Making bones hollow
    Show answerGrowth and repair

  4. Proteins are made up of small units called what?

    • Amino acids
    • Fatty acids
    • Minerals
    • Simple sugars
    Show answerAmino acids

  5. Which job do fats do in the body?

    • Build muscle fibres
    • Carry oxygen in blood
    • Digest starch
    • Store energy and insulate
    Show answerStore energy and insulate

  6. Which mineral is needed for strong bones and teeth?

    • Calcium
    • Iodine
    • Iron
    • Sodium
    Show answerCalcium

  7. Which mineral is needed to make red blood cells?

    • Calcium
    • Iron
    • Potassium
    • Sodium
    Show answerIron

  8. Why is fibre important in the diet?

    • It builds muscles
    • It gives lots of energy
    • It helps food move through the gut
    • It makes bones hard
    Show answerIt helps food move through the gut

  9. Scurvy is caused by a lack of which vitamin?

    • Vitamin A
    • Vitamin C
    • Vitamin D
    • Vitamin K
    Show answerVitamin C

  10. What colour does iodine solution turn when starch is present?

    • Blue-black
    • Brick red
    • Clear
    • Purple
    Show answerBlue-black

  11. Humans can survive for several weeks without water. (True or false?)

    Show answerFalse

  12. The human body can digest fibre to release energy. (True or false?)

    Show answerFalse

  13. Lack of vitamin D can cause weak bones (rickets). (True or false?)

    Show answerTrue

  14. Name one fruit that is rich in vitamin C and helps prevent scurvy. (Answer out loud)

    Show answerAny fruit rich in vitamin C, e.g. orange, lemon, lime, kiwi or strawberry

  15. Which solution do we use to test a food for starch? (Answer out loud)

    Show answerIodine solution

  16. What do we call a diet with the right amounts of all nutrients? (Answer out loud)

    Show answerA balanced diet

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