Microorganisms are tiny living things too small to see with the naked eye.

They include bacteria, viruses, fungi, and protists.

Some bacteria help with digestion and nitrogen fixation.

Viruses can cause diseases but aren’t considered fully alive.

Fungi include mushrooms, molds, and yeasts.

Microorganisms can be found almost everywhere on Earth.

They play important roles in recycling nutrients.

Some microorganisms are used in food production, like yogurt and cheese.

Microbes help clean up oil spills and waste.

Good hygiene helps prevent harmful microorganisms from spreading.