Food

Why do we eat food?

Write out a list of reasons of Why do we eat food?

What is food?

Food is a necessary source of energy and a growth material for the body

Food is any substance, usually composed of carbohydrates, fats, proteins and water, that can be eaten or drunk by an animal, including humans, for nutrition or pleasure. Items considered food may be sourced from plants, animals or other categories such as fungus or fermented products like alcohol. Although many human cultures sought food items through hunting and gathering, today most cultures use farming, ranching, and fishing, with hunting, foraging and other methods of a local nature included but playing a minor role.

- from Wikipedia.org

What we eat is commonly called a Diet,

when people say they are on a Diet, it means they are choosing to only eat from a specific set of foods, usually chosen to reduce fat or sugars, or in the case of Athletes to improve muscle and energy.

What different types of food is there?

OB1 recall that a balanced diet has six constituents:

1. carbohydrates (including fibre),
2. fats,
3. proteins,
4. vitamins,
5. minerals
6. water, each with different functions

There are 6 different types of food

OB2 describe a food pyramid and give examples of types of food recommended in a balanced diet

constituents of a balanced diet

Go on as a class in computer room http://www.safefood.eu

http://www.safefood.eu/Healthy-Eating/Food-Diet.aspx

People with special Dietary requirements http://kidshealth.org/teen/recipes/

OB3 carry out qualitative food tests for starch, reducing sugar, protein and fat

Food tests

OB4 read and interpret the energy values indicated on food product labels and compare the energy content per 100 g of a number of foods, and identify the food types on the label that form part of a balanced diet.

on the back of packs of food you should see a table of food data

food data

OB5 investigate the conversion of chemical energy in food to heat energy

Energy in Foods

Alternative source of experiment .... http://www.mr-damon.com/experiments/3svt/food_energy/index.htm

Is all food good for us ??

which foods are bad and why ?

Commercial food preservation

http://www.boconline.ie/products/products_by_industry/food_and_beverage/food_preservation_products/index.asp

And Finally

Now test yourself

http://www.sciencequiz.net/jcscience/jcbiology/food/food1a.htm