
Identify photosynthesis
Free printable Biology science worksheet for "Identify photosynthesis" — practice photosynthesis and respiration. No-prep, print or assign online.
High school students investigate the biology and chemistry of photosynthesis in this Life Science worksheet, identifying the light-dependent and light-independent reactions, the role of chlorophyll, and the inputs and outputs of the overall process. Teachers can use it as a structured study guide, a pre-lab preparation tool, or a post-lesson consolidation activity that requires students to connect molecular-level events to the global carbon cycle. Mastery of photosynthesis is a cornerstone for understanding ecology, biochemistry, and climate science.
Learning objectives
- Identify the reactants, products, and stages of photosynthesis
- Explain the role of chlorophyll and light in driving the photosynthetic reactions
- Connect photosynthesis to broader biological and ecological processes
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 High 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 photosynthesis” worksheet free?
Yes. “Identify photosynthesis” 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 High School (ages 14–18), 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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