Microorganisms

One of the topics covered in KS2 Science is microorganisms. This includes what they are (viruses, certain fungi and bacteria), how some types can cause disease and how others are useful to us.

Microorganisms are tiny life forms, so small that we need a microscope to see them. There are many types: bacteria, viruses and some kinds of fungi. Did you know that if you could weigh all the microorganisms on the Earth, they would weigh more than all other species combined? Microorganisms are found in every environment on the planet - even in the stomachs of cows and your own intestines!

What can we use to kill bacteria? Are viruses alive? How do fungi help us to make bread? Try this quiz to see what you know about these tiny living organisms.