Food procressing

Question 1

Food processing

Answer 1

Any change to natural state of food

Question 2

Food preservation

Answer 2

Any method of treating food to make it last longer.

Micro-organisms need certain conditions to grow. Any removed, food lasts longer.

Question 3

Conditions required for micro-organism growth

Answer 3

Food 
Warmth
Moisture
Oxygen
oH (acid/alkaline)

Question 4

Methods of food preservation

Answer 4

Freezing
Freeze drying
Drying 
Pasteurisation
Canning
Jam making
Bottling
Preservatives
Irradiation

Question 5

freezing

Answer 5

Very low temps used. Water changes to ice.

Question 6

Freeze drying

Answer 6

Food frozen, moisture removed.

Question 7

Drying

Answer 7

Moisture removed

Question 8

Pasteurisation

Answer 8

Milk heated and cooled rapidly to kill harmful bacteria.

Question 9

Canning

Answer 9

High temps used. Cans airtight

Question 10

Jam making

Answer 10

Fruit boiled. High sugar content (chemical preservative). Jars airtight.

Question 11

Bottling

Answer 11

Very high temps used. Glass jars sterilised & airtight.

Question 12

Preservatives

Answer 12

Chemicals such as sugar, salt (chemical preservatives)” vinegar, smoke prevent micro-organism growth. They cannot live in high concentration of these substances.

Question 13

Irradiation

Answer 13

Energy waves passed through food to kill micro-organisms.

Question 14

Why food is processed

Answer 14

Micro-organisms killed
Waste prevented
Enzyme activity prevented
Adds variety to diet
Nutritive value retained
Seasonal food available all year
Food easier to transport & store