humans as organisms-foods

starchy carbohydrates

slow release energy, pasta and bread

sugary carbohydrates

Quick release energy, sugary foods

protein

For growth an repair, meat, fish, nuts

Fats

Insulates the body and stores energy, found in milk cream and butter

vitamins

for health, fruits an vegetables

minerals

for health, fruits vegetables and dairy products

fibre

maintain a healthy digestive system, wholemeal bread and cereals

water

for health, it dissolves substances an fills cells

how to test for protein

mash food and add 10 drops of biuret solution and wait a few mins, it will change blue to purple

Glucose (sugar)

mash food, add water and add 10 drops of benedict solution, heat in a water bath until boiling, shoul change from blue to green, yellow or red

starch

Add iodine solution to the food, and observe a color change from brown to blue-black if starch is present.

Fat

Rub food onto a piece of filter paper, and hold up to the light, if there is a greasy mark then there is fat present.