Food and Nutrition - Class 6 Science Revision Notes

• Food Preservation
  • Reason for Preserving Food
  • Methods of Food Preservation

Food Preservation

It is the process of storing and handling food properly so as to stop or slow down its spoilage.

Reason for Preserving Food

• To reduce food wastage
• To prevent it from being spoilt
• For easy transport
• To make food available when out of season.

Methods of Food Preservation

Food preservation is classified into;

• Traditional methods
• Modern methods

Traditional Methods

They include;

• Smoking- forms a coat
• Drying- reduce moisture
• Salting- reduce moisture
• Use of honey- prevents oxygen
• Use of ash- reduce moisture

Modern Methods

• Canning-killing germs and preventing oxygen
• Refrigeration- low temperature
• Freezing- low temperature

Drying is both traditional modern method of preserving food. It is also the cheapest method of food preservation.