Learn about microorganisms, the study of microbiology and why these tiny creatures are so important to living things with this fun, interactive science activity. Microorganisms are important to life on Earth, living in all parts of the biosphere where there is water, acting as decomposers in various ecosystems and playing a vital role in the nitrogen cycle. Different types of microorganisms include bacteria, fungi, types of algae and plankton. Microorganisms exist in many different places and often where you don't expect, they make their home on food, plants, humans and lots of other living things. Look hard and spot places where you think they might be at work. Learn about bacteria that live in decaying leaves, diseases, moldy fruit, yeast in breads, bacteria in yoghurt, salmonella living in uncooked food and more. Sort the different types of microorganisms into those that are helpful and those that are harmful and enjoy this fun microorganisms game for kids.