
Identify microorganism roles
Free printable Grade 6 science worksheet for "Identify microorganism roles" — practice microorganisms. No-prep, print or assign online.
Microorganism roles in ecosystems and human life are the subject of this middle-school Life Science worksheet, guiding students to identify how bacteria, viruses, fungi, and protists function as decomposers, pathogens, and beneficial partners. Teachers can use it within a microorganisms unit to move students beyond basic identification toward understanding ecological and health relationships. Recognizing the diverse roles microorganisms play prepares students for concepts in public health, medicine, and environmental science.
Learning objectives
- Identify the major roles microorganisms play in ecosystems and human health
- Distinguish between beneficial and harmful microorganism roles
- Connect specific microorganism types to their ecological or biological functions
Answer Key

How to use this worksheet
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- Print at home or in class for Middle School; it's no-prep, with no extra materials needed.
- Use the included answer key to mark it in seconds.
Frequently asked questions
Is the “Identify microorganism roles” worksheet free?
Yes. “Identify microorganism roles” is a free printable Science worksheet. Sign in with Google or email to download the PDF instantly.
What grade or age is this Science worksheet for?
It's designed for Middle School (ages 11–14), covering Microorganisms.
Does it come with an answer key?
Yes — a matching answer key is included so you can grade it in seconds.
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