Photosynthesis Worksheet - Free Printable

This worksheet is about photosynthesis, the process by which plants make their own food using sunlight. The diagram shows a sunflower plant with arrows pointing to different parts, and blank boxes where you need to label the inputs and outputs of photosynthesis.

Let’s go step-by-step to solve this:

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🔹 What is Photosynthesis?

Photosynthesis is the process in which green plants use sunlight, carbon dioxide (CO₂), and water (H₂O) to produce glucose (a type of sugar for energy) and oxygen (O₂). This process occurs mainly in the leaves of the plant, in structures called chloroplasts.

The general equation for photosynthesis is:
> Sunlight + Carbon Dioxide + Water → Glucose + Oxygen

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🔹 Labeling the Diagram

Here are the correct labels for each box based on the arrows:

1. Arrow from the Sun → Plant (top left):
➤ Sunlight
*(Energy source for photosynthesis)*

2. Arrow from the air → Plant (right side):
➤ Carbon Dioxide (CO₂)
*(Taken in through tiny openings in leaves called stomata)*

3. Arrow from soil → Plant (bottom left):
➤ Water (H₂O)
*(Absorbed by roots from the soil)*

4. Arrow from plant → air (bottom right):
➤ Oxygen (O₂)
*(A waste product released into the air)*

5. Arrow from plant → soil (bottom right):
➤ Roots absorb minerals/nutrients
*(Note: While not part of the main photosynthesis equation, roots absorb essential nutrients from the soil that support plant growth. But if the focus is strictly on photosynthesis, this may be labeled as "Water and minerals" or just "Water.")*

6. Arrow from plant → top (leaves):
➤ Glucose (Food)
*(The sugar produced during photosynthesis, used for energy and growth)*

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✔ Final Answer Summary:

- Top left box (sun → plant): Sunlight
- Right side box (air → plant): Carbon Dioxide
- Bottom left box (soil → plant): Water
- Bottom right box (plant → air): Oxygen
- Bottom right box (plant → soil): Water and minerals (or just Water)
- Top right box (plant → leaves): Glucose (or Food)

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🔹 Write the Definition at the Top:

In the space above the diagram, write:

> PHOTOSYNTHESIS
> *Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to make their own food (glucose) and release oxygen.*

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🌿 Bonus Tip:

You can color the diagram after labeling! For example:
- Yellow for the sun
- Green for the plant
- Blue for water
- Red or black for CO₂ and O₂ labels

This helps reinforce learning visually.

Let me know if you'd like a printable version or a filled-in PDF!