Microorganisms processes cause food becomes spoilt

Exposed food to environment, actions by microorganisms

Changes of colour, unpleasent smell, tastes sour & slimy

The texture, smell and taste of food are not the same as before

The meat looks black and smells bad

Removes water content in food using heat

Removing air content can prevent microorganisms

Igniting is a method of drying over fire with a long period of time.

Use a solution of sugar or vinegar to prevent the growth of microorganisms