one celled organisms with no nucleus

more bacteria on earth than any other kind of living thing

one handful of soil can contain billions of bacteria

harmful bacteria

bacteria found in raw chicken, raw meat, raw eggs

spreads by touching other food

cooking the food kills the bacteria, but it will begin to grow again if the food is left out of the refrigerator for more than two hours

strep throat; bronchitis; pneumonia

there is medicine available that can cure bacterial infections

can only cure bacterial infections

used during WWII

microorganism including mold, yeast, and mushrooms

harmful mold and fungi can spread through crops and kill them

mold grows on food to decompose it, but the food becomes unsafe to eat

fungus can also cause skin diseases like fungal ear infections, ringworm, and athlete's foot

not considered a microorganism because they only reproduce once they enter a living cell

smaller than bacteria

cause colds and diseases and change quickly as they reproduce

medicine that kills one virus will not kill another virus

Bacteria is very important to our world, we could not live without it.

They provide us with different types of food.

Yeast makes bread, rolls, and cakes rise.

Produce medicine

• Penicillin is an antibiotic that kills harmful bacteria (made of mold).

Algae is helpful microorganism that is a food source for aquatic animals and provides us with most of the oxygen we breathe.

live bacteria and yeast that help your body digest food

1 gram of yogurt can contain 1 billion probiotics

Without these microorganisms, Earth would otherwise be covered with a thick layer of dead plants and animals.