Bacteria is a kind of microorganism.
Microorganisms are very, very, very small- about 1 to 2 microns in size. You have to use a microscope to see them.
They live in the submicroscopic world.
Microorganisms are decomposers. They eat animal dung and help recycle the nutrients back into the soil.
They got to the farm on their own once the soil was healthy.
Microorganisms are the oldest life forms on earth. They even are older than dirt.
A type of microorganism is a water bear, they are also called tardigrades. They can survive almost anything including space, a nuclear bomb, and lava. Their largest size is 1.2 mm.
Microorganisms can also be types of fungi, archaea or protists.
Bellow is a picture of a tardigrade:
Microorganism Example: