Introduction

Question 1

What two things do foods contain which cause food spoilage?

Answer 1

Microorganism and enzymes

Question 2

What does food preservation do to a food?

Answer 2

It prevents it from spoiling

Question 3

How does preserving methods of food prevent food spoilage?

Answer 3

By removing one or more of the conditions that microorganisms and enzymes require for survival

Question 4

What are the four main principles of food preservation?

Answer 4

Inhibits the microbial activity that causes spoilage and food poisoning

Inactivates the enzyme activity that causes food spoilage

Prevents microorganisms re-entering food by sealing it

Maintains colour, taste, texture and nutritional value of foods as much as possible

Question 5

What are the five main advantages of preserving food?

Answer 5

Avoids food waste

Makes out-of-season foods available all year round

Adds variety to the diet

Saves money as preserved foods can be bought in bulk when on special offer and will last long

Useful in unforeseen circumstances i.e. they are convenient

Question 6

What are the four main methods of home preservation?

Answer 6

Freezing

Heat treatments

Chemical preservation

Dehydration