Science Differentiation in action A balanced diet contains
Science Differentiation in action A balanced diet contains all the food types in the right amounts to stay healthy. carbohydrates sugar starch fibre
Science Differentiation in action Food
Science Differentiation in action A balanced diet contains all the food types in the right amounts to stay healthy. carbohydrates For energy Prevents constipation sugar starch fibre
Science Differentiation in action A balanced diet contains all the food types in the right amounts to stay healthy. fats For energy and insulation
Science Differentiation in action A balanced diet contains all the food types in the right amounts to stay healthy. proteins
Science Differentiation in action A balanced diet contains all the food types in the right amounts to stay healthy. proteins For growth and repair of cells
Science Differentiation in action A balanced diet contains all the food types in the right amounts to stay healthy. vitamins For healthy skin and gums For strong bones vitamin C vitamin D
Science Differentiation in action A balanced diet contains all the food types in the right amounts to stay healthy. minerals To make red blood cells For strong bones Iron Calcium
Science Differentiation in action A balanced diet contains all the food types in the right amounts to stay healthy. water
Science Differentiation in action A balanced diet contains all the food types in the right amounts to stay healthy. water Used to make blood and to dissolve and transport substances
Science Differentiation in action How do we know how much of each food type to eat? We can use the Food Pyramid. Oil and Sugar Milk, Cheese, Yogurt Fruit and Vegetables Bread, Potatoes, Pasta Meat, Fish, Nuts
Science Differentiation in action Review Question What is the function of each food type in the table? Carbohydrates (i) Sugar For energy (ii) Starch For energy (iii) Fibre Prevents constipation Protein For growth and repair of cells Fat For energy and insulation Vitamins Minerals Water (i) Vitamin C For healthy skin/gums (ii) Vitamin D For strong bones (i) Calcium For strong bones (ii) Iron To make red blood cells To dissolve and transport substances
Science Differentiation in action To Test for Protein (Biuret Test) Method: 1) Dissolve a sample of protein (milk) in water. 2) Add a few drops of sodium hydroxide (colourless) 3) Add a few drops of copper sulfate (blue) blue Sample of milk
Science Differentiation in action Results If protein is present, the colour will change from blue to purple. What does it mean if the colour remains blue?
Science Differentiation in action Revision of the Food Tests Food tested Glucose (reducing sugar) Fats Protein Starch Chemicals used Original colour Colour if food present
Science Differentiation in action Revision of the Food Tests Food tested Glucose (reducing sugar) Fats Protein Starch Chemicals used Benedicts solutions Brown Paper Copper sulfate Hydrogen peroxide Iodine Original colour Blue No stain Blue Brown/yellow Colour if food present Brick red Stain Purple Blue/Black
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