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Tiny Living Wonders

Microbiology

An introduction to the microscopic world of bacteria, fungi, and viruses for curious young minds.

science biology microbes

12 Questions Hard Ages 5+ Apr 9, 2026

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About this Study Set

This study set covers Microbiology through 12 practice questions. An introduction to the microscopic world of bacteria, fungi, and viruses for curious young minds. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 12 questions from the Tiny Living Wonders study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which tiny living thing is used by bakers to make bread dough rise?

A Yeast
B Bacteria
C Virus
D Algae

2 Where do most bacteria live?

A Only in water
B Only in soil
C Everywhere on Earth
D Only inside humans

3 What do we call the tool scientists use to look at things too small for our eyes to see?

A Telescope
B Microscope
C Magnifying glass
D Periscope

4 Some tiny organisms help us digest food in our bellies. What are they called?

A Good bacteria
B Harmful viruses
C Tiny insects
D Cold germs

5 Which of these is a type of fungus that can grow on bread if it is left out for too long?

A Bacteria
B Mold
C Virus
D Dust

6 What is the name for the tiny, single-celled organisms that are neither plants nor animals?

A Protists
B Rocks
C Sand
D Stars

7 Are all bacteria harmful to humans?

A Yes, all of them
B No, many are helpful
C Only the blue ones
D Only the big ones

8 How do bacteria reproduce?

A They lay eggs
B They divide into two
C They grow from seeds
D They hatch from cocoons

9 What are viruses that infect bacteria called?

A Bacteriophages
B Fungicides
C Antibiotics
D Probiotics

10 Which of these things is too small to be seen without a microscope?

A A ladybug
B An ant
C A bacterium
D A blade of grass

11 What is the jelly-like substance inside a cell called?

A Cytoplasm
B Peanut butter
C Juice
D Water

12 Some microbes produce oxygen, which is essential for us to breathe. Which group does this?

A Cyanobacteria
B Viruses
C Mold
D Yeast

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