Science Differentiation in action

carbohydrates

sugar fibre

A balanced diet contains all the food types in the right amounts to stay healthy.

starch

Science Differentiation in action

FoodFood

Science Differentiation in action

Forenergy

Forenergy

Preventsconstipation

carbohydrates

sugar starch fibre

A balanced diet contains all the food types in the right amounts to stay healthy.

Science Differentiation in action

Forenergy and insulation

fats

A balanced diet contains all the food types in the right amounts to stay healthy.

Science Differentiation in action

proteins

A balanced diet contains all the food types in the right amounts to stay healthy.

Science Differentiation in action

A balanced diet contains all the food types in the right amounts to stay healthy.

proteins

For growthand repair

of cells

Science Differentiation in action

vitamin C vitamin D

vitamins

A balanced diet contains all the food types in the right amounts to stay healthy.

For healthy skin

and gums

For strong bones

Science Differentiation in action

To make redblood cells

For strong bones

minerals

A balanced diet contains all the food types in the right amounts to stay healthy.

Iron Calcium

Science Differentiation in action

water

A balanced diet contains all the food types in the right amounts to stay healthy.

Science Differentiation in action

water

A balanced diet contains all the food types in the right amounts to stay healthy.

Used to make blood

and

to dissolve and

transport substances

Science Differentiation in action

Oil and Sugar

Meat, Fish, NutsMilk, Cheese, Yogurt

Fruit and Vegetables

Bread, Potatoes, Pasta

We can use the Food Pyramid.

How do we know how much of each food type to eat?

Science Differentiation in action

What is the function of each food type in the table?

Carbohydrates (i) Sugar

(ii) Starch

(iii) Fibre

Protein

Fat

Vitamins (i) Vitamin C

(ii) Vitamin D

Minerals (i) Calcium

(ii) Iron

Water

For energy

For energy

Prevents constipation

For growth and repair of cells

For energy and insulation

For healthy skin/gums

For strong bones

For strong bones

To make red blood cells

To dissolve and transport substances

Review Question

Science Differentiation in action

To Test for Protein (Biuret Test)To Test for Protein (Biuret Test)

Method: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 (blueblue)

Sample of milkSample of milk

Science Differentiation in action

ResultsResults

If protein is present, the colour will change from blue If protein is present, the colour will change from blue to purple.to purple.

What does it mean if the colour remains blue?What does it mean if the colour remains blue?

Science Differentiation in action

Food tested Chemicals used

Original colour Colour if food present

Glucose (reducing

sugar)

Fats

Protein

Starch

Revision of the Food TestsRevision of the Food Tests

Science Differentiation in action

Food tested Chemicals used

Original colour Colour if food present

Glucose (reducing

sugar)

Benedicts solutions

Blue Brick red

Fats Brown Paper No stain Stain

Protein Copper sulfate Hydrogen peroxide

Blue Purple

Starch Iodine Brown/yellow Blue/Black

Revision of the Food TestsRevision of the Food Tests