Vocab
What do scientists call living things such as plants, animals, and bacteria?
organisms
Which is bigger: human hair or a bacterium?
Hair
True or False: All microorganisms make us sick.
False
What did the red discs represent in the image with the tiny organism?
Red blood cells
What word describes organisms too small to see without special equipment?
microorganism
What tool do scientists use to see microorganisms?
microscope
What role do many microorganisms in our body play?
Help keep us healthy.
What is one example of a living thing you cannot see with your eyes alone?
Bacteria, mites, microorganisms
What word means “the relative size of things”?
Scale
How many times closer was the fingerprint image zoomed in when we saw microorganisms?
2,000x
Where do eyelash mites live?
On eyelashes
True or False: All the images on the scale cards are shown are the same scale?
False — you can’t tell the size just by looking!
True or False: All organisms can be seen with the naked eye.
False
Arrange from smallest to largest: human, microorganism, red blood cell.
microorganism → red blood cell → human
What part of science studies living things?
Life science
What’s something surprising about the microbiome that students often don’t believe at first?
We all carry around trillions of microorganisms on and in our bodies