Foods cannot keep long at room temperature. Food turns bad because of the growth of micro organisms such as bacteria and fungi. The faster the micro organisms grow, the faster the food will be spoilt.
Characteristics of spoilt food:
a) a bad smell
c) becomes mouldy
d) becomes limp and wilted
e) dark spots
Some examples of spoilt food
Food | Appearance |
Bread | Mouldy Patches of black and green Unpleasant smell  |
Becomes curds Has a sour smell and taste  | |
Fish and Meat | Unpleasant smell Become slimy Become soft  |
Fruits | Bruised skin and flesh Unpleasant smell  |
Micro organisms that cause food to spoil need air, water, nutrients, suitable temperature and suitable acidity to grown and multiply.
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