Photosynthesis Basics

Grade

7th Grade

Duration

40 minutes

Unit

Energy Flow in Ecosystems (Lesson 1 of 6)

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Standards Alignment

Next Generation Science Standards (NGSS)

• MS-LS1-6: Construct a scientific explanation based on evidence for the role of photosynthesis in the cycling of matter and flow of energy into and out of organisms.

Common Core State Standards (CCSS) – ELA Literacy in Science and Technical Subjects

• CCSS.ELA-LITERACY.RST.6-8.3: Follow precisely a multistep procedure when carrying out experiments, taking measurements, or performing technical tasks.
• CCSS.ELA-LITERACY.RST.6-8.7: Integrate quantitative or technical information expressed in words in a text with a version of that information expressed visually (e.g., in a flowchart or diagram).

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Learning Objectives ("I can" statements)

• I can explain the process of photosynthesis and identify its basic components (sunlight, carbon dioxide, water, glucose, oxygen).
• I can create a simple diagram that models how photosynthesis works.
• I can describe why photosynthesis is important for energy flow in ecosystems.

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Success Criteria

• Students correctly describe the photosynthesis process in their own words.
• Students produce a labeled diagram showing the inputs and outputs of photosynthesis.
• Students participate actively in discussions and hands-on activities.

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Materials

• Whiteboard and markers
• Pre-made photosynthesis vocabulary cards (sunlight, carbon dioxide, water, glucose, oxygen, chlorophyll)
• Blank paper and colored pencils/markers
• Clear plastic bottles with small plants or images of plants (for visual reference)
• Visual aids with dyslexia-friendly fonts (e.g., OpenDyslexic) and color contrast
• Bilingual vocabulary sheets (English-Spanish) for ELL students
• Projector or visual display for step-by-step photosynthesis animations (optional)

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Lesson Procedure

1. Introduction & Engagement (7 minutes)

• Begin by asking students: “What do plants need to live and grow?”
• Introduce key vocabulary using cards with images and text. Pronounce and have students repeat. Include Spanish terms for ELL students to build vocabulary bridge.
• Use a simple sentence frame: “Plants take in ___, ___, and ___ to make ___ and ___.”

Differentiation:

• For students with IEPs or behavioral challenges, provide visual vocabulary and allow fidget tools during discussion to increase focus.
• Struggling readers view dyslexia-friendly slides with large font, spacing, and color-coded words.

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2. Hands-on Activity: Modeling Photosynthesis (15 minutes)

• Show a brief animation or diagram of the photosynthesis process, emphasizing inputs (sunlight, CO2, water) and outputs (glucose, oxygen).
• Break students into pairs. Each pair receives a printed blank “Photosynthesis Diagram” worksheet to fill in, labeling inputs, process, and outputs.
• Provide colored pencils to draw arrows and label components clearly.
• Circulate to provide personalized support, asking probing questions like:
  “What does the plant do with sunlight?”
  “Where does the oxygen come from?”

Differentiation:

• Gifted students can add more detail to diagrams or write a short explanation paragraph.
• Use bilingual diagrams and vocabulary sheets for Spanish-speaking students.
• Offer sentence starters for students who struggle with writing (e.g., “The plant uses ___ to make ___.”).

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3. Group Discussion & Explanation (10 minutes)

• Come back together as a class. Invite pairs to share their diagrams and explain the parts of photosynthesis.
• Pose guiding questions:
  “Why do you think photosynthesis is important for animals?”
  “How does this process connect to energy flow in an ecosystem?”
• Summarize key points on the whiteboard in a simple flow chart form.

Differentiation:

• Use call-and-response format and visuals to engage all learners.
• Provide sentence frames for responses: “Photosynthesis is important because…”
• Allow non-verbal students to show parts on their diagrams instead of speaking.

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4. Quick Formative Assessment (5 minutes)

• Distribute a short exit ticket:
  1. List the three things plants need for photosynthesis.
  2. What two things do plants produce?
  3. Draw a quick arrow diagram showing inputs going into a plant and outputs coming out.

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Extension Activities for Advanced Learners

• Research and present on how photosynthesis varies among different plant types (e.g., C3 vs. C4 plants).
• Investigate and write about how photosynthesis affects global oxygen levels and climate.

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Reflection & Homework

• Students write 2-3 sentences at home (with visual word banks) about “Why is photosynthesis a vital process?”
• Gifted students prepare a short verbal explanation for next class.

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Teacher Notes on Differentiation

• Behavioral challenges: Keep tasks short with clear routines; provide movement breaks if needed.
• ELL students: Use dual-language vocabulary supports and pair with bilingual peers.
• IEPs: Modify writing tasks; allow drawing or oral explanations.
• Dyslexia friendly: Use clear fonts, breaks in text, and color-coded key terms.

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This lesson combines engaging visuals, hands-on activities, and clear, scaffolded instruction aligned with NGSS and Common Core reading standards to ensure deep understanding of photosynthesis as a foundational ecological process.