# Nutrients and a balanced diet

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

Source: https://olyclass.com/library/science-g8-nutrients-diet-en/

- Subject: Science
- Level: Grade 8
- Quiz: 16
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## Questions

1. Which nutrient is the body's main source of energy? (Carbohydrates / Fibre / Minerals / Vitamins)
   Answer: Carbohydrates
2. Which food is a rich source of starch? (Butter / Egg white / Orange juice / Potatoes)
   Answer: Potatoes
3. What are proteins mainly needed for? (Cleaning the blood / Dissolving food / Growth and repair / Making bones hollow)
   Answer: Growth and repair
4. Proteins are made up of small units called what? (Amino acids / Fatty acids / Minerals / Simple sugars)
   Answer: Amino acids
5. Which job do fats do in the body? (Build muscle fibres / Carry oxygen in blood / Digest starch / Store energy and insulate)
   Answer: Store energy and insulate
6. Which mineral is needed for strong bones and teeth? (Calcium / Iodine / Iron / Sodium)
   Answer: Calcium
7. Which mineral is needed to make red blood cells? (Calcium / Iron / Potassium / Sodium)
   Answer: Iron
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)
   Answer: It helps food move through the gut
9. Scurvy is caused by a lack of which vitamin? (Vitamin A / Vitamin C / Vitamin D / Vitamin K)
   Answer: Vitamin C
10. What colour does iodine solution turn when starch is present? (Blue-black / Brick red / Clear / Purple)
   Answer: Blue-black
11. Humans can survive for several weeks without water.
   Answer: False
12. The human body can digest fibre to release energy.
   Answer: False
13. Lack of vitamin D can cause weak bones (rickets).
   Answer: True
14. Name one fruit that is rich in vitamin C and helps prevent scurvy.
   Answer: Any 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: Iodine solution
16. What do we call a diet with the right amounts of all nutrients?
   Answer: A balanced diet