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Food
Junior Science
| Question | Answer |
|---|---|
| Why do we need food | Energy, growth and repair of cells and protection against disease |
| What are the five main nutrients (food groups) | carbohydrates, fats, proteins, vitamins and minerals |
| ICarbohydrates can be divided into three separate groups, what are they | Sugar, Starch and Fibre |
| What is the function of carbohydrates | provides energy |
| What is the function of fibre | Prevents constipation |
| Name two sources of sugar | Jam, honey |
| Name two sources of starch | potatoes, pasta |
| Name two sources of fibre | Bran, vegetables |
| What is the function of fats | provides heat and energy |
| What is the function of proteins | Growth and repair of cells |
| Name two sources of fats | Butter, Cheese |
| Name two sources of proteins | Lean meat, Fish |
| What is the function of vitamins | Healthy skin and gums and strong bones |
| Name two common vitamins | Vitamin C And Vitamin D |
| From what foods can you get Vitamin C | Citrus fruits e.g. Oranges |
| From what foods can you get Vitamin D | Milk, cheese |
| What is the function of vitamin C | Healthy skin and gums |
| What is the function of Vitamin D | Strong bones |
| Name two common minerals in the diet | Calcium and Iron |
| Why is calcium important In the diet | Strong healthy bones |
| Why is iron important in the diet | To make red blood cells |
| From what foods do you get calcium | Milk and cheese |
| From what foods do you get Iron | Liver and spinach |
| What percentage of the human body is made of water | 70% |
| Why is water important in the diet | It transports dissolved substances around the body |
| Why do we have to drink water | To replace water lost from the body through sweat or urine |
| What do you call a diet that contains the right amount of all food types needed to stay healthy | Balanced diet |
| What is a food pyramid | A diagram that shows the amount of each food type an average person should have to have a balanced diet |
| To test for fats what are the two main things that are needed | Brown paper and oil |
| If oil is present what happens on the brown paper | A translucent spot appears |
| What does translucent mean | It lets light through |
| To test for starch what is the name of the dye that is added to the starch solution | Iodine |
| What colour is iodine | Yellow |
| What colour does the starch solution turn to if starch is present | Blue/black |
| What is another name for the test for protein | Biuret test |
| When testing for protein what is the name of the reagents that are added to the milk | Sodium hydroxide and Copper sulphate solution |
| If protein is present in the milk what indicates a positive result | A purple colour |
| When testing for glucose what is the name of the reagent that is added to the glucose solution | Benedicts Solution |
| If Glucose is present what colour change occurs after placing in a boiling water bath for 3minutes | A brick red colour |
| When investigating the conversion of chemical energy into heat energy what happens to the thermometer above the burning food sample | Temperature rises |
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gcu science
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