During processing many foods may lose some of their nutrients.
Teacher Input 1
Greet the learners.
Where do you keep your milk and cheese at home?
Why is some food stored in a fridge and some food stored in a cupboard? Give reasons for your answers.
How do you think people from long time ago, before fridges or freezers were invented, kept their food fresh and safe to eat?
Answer: People used salt, vinegar and spices to make meat last longer (to preserve it) and then they hung it out to dry.Biltong is an example of dried or cured meat. When we cure fish, we get bokkoms.
Explorers from hundreds of years ago – Vasco da Gama, Christopher Columbus and Bartholomew Diaz had to take a lot of food and water supplies on their ships when they went on long sea journeys. This food and water had to last for a long time, since they would not reach land for many months after setting sail.
The sailors had a diet consisting of: salted or pickled fish and meats (beef and pork), salted flour, lentils, chickpeas, beans, rice, sea biscuits, honey, raisins, cheese and liquids (water, vinegar, wine and olive oil).
Explain that the foods that da Gama, Columbus and Diaz took on their sea journeys are examples of processed food.
Write the names of the following foods on your blackboard.
pilchards in a tin
polony or ham
To indicate which of the listed foods they like eating and to give a reason why they like / do not like these foods.
What do all these foods have in common?
Answer: All these food have been processed in one way or another.
Ask learners: Why is food processed?
Help the learners to identify three reasons:
Food is processed to make it last longer.
Examples of this kind of food are: biltong, dried fruit, pickled onions, tin food (like pilchards and baked beans).
Food is processed to make it edible.
Examples of this kind of food are: popcorn, rice and samp.
Food is processed to improve its nutrient value.
Example of this kind of food is peanut butter, yogurt, amasi, cheese and bread.
Explain that when we ferment milk to make yogurt, buttermilk and cheese, this form of processing ads to the nutritional value of the products, for example, yoghurt contains bacteria that is good for us.
Preservation of food is necessary in order to keep them eatable. Sometimes due to excess heat or excess of water make the food smelly and unhealthy. We need to preserve the food so that it will not get smelly and remain eatable.