Lesson 0 of 10
Start here
Show on a big screenA spoonful of curd looks smooth. Look through a lens, and it is a crowd of microbes. Microbes are living things too small to see one by one.
This is Chapter 2, The Invisible Living World: Beyond Our Naked Eye.
What you will learn
- A lens makes a tiny thing big enough to see.
- Kinds of microbe: bacteria, fungi, protozoa and viruses.
- Where they live, and the jobs they do for us.
- Food often spoils when microbes grow in it. Some microbes also do harm.
- Salt, sugar, drying and cold keep them from growing.
Need a quick recap?
- Grouping (in Diversity in the Living World) — one feature, one sort.
- Habitats (same track) — where a living thing finds what it needs.
- A plant makes its own food (in Life Processes in Plants).
Stay safe
Nothing here is grown for real. Never taste or smell old, mouldy food.