Food 01
Cucumbers contain little or no carbohydrates.

Food 01

This KS3 Science quiz takes a look at food. Plants are able to make their own food through the process of photosynthesis but animals, including humans, need to eat. Once food is inside the body of an animal, it is digested in order to release the nutrients. The nutrients can be grouped together - carbohydrates, proteins, fats, fibre, vitamins and minerals. A balanced diet is essential to good health. Eating a balanced diet means that you eat a wide variety of different foods that give you all of the nutrients you need in the correct quantities. The way we live nowadays tends to provide us with more fats and carbohydrates than are needed.

Carbohydrates and fats supply the body with calories that provide our cells with the energy they need to work. Any excess calories are stored in the body in special cells just beneath the skin. Proteins are required to help our bodies grow and repair damage. Fibre is required to help with digestion. Vitamins and minerals are required only in small quantities but are essential to many of the chemical reactions that occur in our bodies. Without them, we are less resistant to disease, have less energy and can suffer permanent damage to our nervous system.

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  1. Which of the following foods contain little or no fibre?
    Fresh fruit and vegetables contain vitamins and fibre
  2. What are proteins used for?
    Proteins are long chains of different amino acids
  3. Fibre is needed for what?
    It also helps prevent bowel cancer
  4. Which of the following foods contain little or no protein?
    Butter contains mainly fat
  5. What are fats used for?
    As well as stored energy, they provide insulation
  6. Iron, a mineral, is needed for what?
    Calcium, also a mineral, is needed for bones and teeth
  7. Which of the following contains most calcium?
    Milk-based products are a good source of calcium
  8. What are small amounts of vitamins needed for?
    If your cell chemistry doesn't work properly all sorts of things can start to go wrong with your body
  9. What are carbohydrates used for?
    They provide energy through respiration
  10. Which of the following foods contain little or no carbohydrates?
    A cucumber is a good source of vitamins and minerals

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