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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