
Classify matter cycling in organisms
Free printable Grade 7 science worksheet for "Classify matter cycling in organisms" — practice photosynthesis and respiration. No-prep, print or assign online.
Middle school students examine how matter cycles through living organisms by classifying key steps in photosynthesis and cellular respiration in this Life Science worksheet. Teachers can use it to help students see how carbon, oxygen, and other elements move between plants and animals within an ecosystem. The worksheet deepens understanding of energy flow and is appropriate for independent practice or a lab follow-up.
Learning objectives
- Classify the roles of photosynthesis and respiration in matter cycling
- Trace how carbon and oxygen move through organisms in an ecosystem
- Explain the relationship between producers and consumers in matter cycles
Answer Key

How to use this worksheet
- Click “Download Worksheet” and sign in with Google or email to get the PDF instantly.
- 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 “Classify matter cycling in organisms” worksheet free?
Yes. “Classify matter cycling in organisms” 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 Photosynthesis and respiration.
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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