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KS3 Useful Microbes

This section highlights to students that not all microbes are harmful by examining beneficial microbes. This lesson aims to explore the various ways and means by which we utilise certain organisms for our benefit with examples from the food industry.

Last Updated October 5, 2020 Medium English Bacteria, Culture, Fermentation, Fungi, Micro-organism, Microbes, Microscope, Probiotic, Useful
  • Overview

What will you learn?

Through a yogurt making activity, students observe first-hand how microbes can be put to good use in the food industry, and learn that these microbes are beneficial to our gut, helping us digest.

Activities include:

  • Yogurt making activity, where students observe how microbes can be put to good use in the food industry.
  • Examining a yogurt culture under a microscope, observe the presence of useful bacteria and report on the findings.

Learning Objectives:

  • Understand that some microbes can keep us healthy.
  • Understand that some microbes can be put to good use.
  • Understand that we need bacterial colonisation to live a healthy life.
  • Understand that we need to protect our normal microbial flora.

Requirements:

  • Activity 1
  • Beaker
  • Cling film
  • Powdered milk
  • Whole milk
  • Live natural yogurt
  • Sterile spoon
  • Hot plate
  • Water bath 20°C
  • Water bath 40°C
  • Activity 2
  • Bunsen burner
  • Cover slips
  • Methylene blue
  • Microscope
  • Microscope slides
  • Sterile droppers

Curriculum Links:

  • Science: Working Scientifically, Experimental skills and investigations, Biology, Structure and function of living organisms, Material cycles and energy
  • Design & technology: Cooking and nutrition
  • RSHE: Health & Prevention
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