February 2025

Food Preservation

By |2025-02-12T09:18:49+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Perishable foods Perishable foods ZIMSEC O Level Combined Science Notes: Food Preservation

  • A lot of the fresh food that humans eat is perishable
  • This is because this food is also food for bacteria, fungi and other micro-organisms
  • If fresh perishable food is left out in the open it will soon deteriorate […]
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Experiment: Finding conditions necessary for growth of microorganisms

By |2025-02-12T09:19:51+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Mouldy bread and their conditions. Image credit Mouldy bread and their conditions. Image credit wordpress.com ZIMSEC O Level Combined Science Notes: Experiment: Finding conditions necessary for growth of microorganisms

Aim: To determine factors affecting the growth of microorganisms in food

Materials:  3 containers with sterilized lids, brad, milk, burners, drying agent (calcium chloride)

Method

  1. Pour […]
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