Photosynthesis Diagram online exercise for - Free Printable

This worksheet is about photosynthesis, the process by which green plants and other producers convert light energy into chemical energy (food). Let’s break down and fill in each part logically.

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## 🌞 1. The Photosynthesis Equation (Top Box)

The general chemical equation for photosynthesis is:

> Carbon dioxide + Water → Glucose + Oxygen
> *(in the presence of light energy and chlorophyll)*

So, filling in the blanks:

```
_______ + _______ Light energy _______ + _______
CO₂ H₂O → C₆H₁₂O₆ O₂
```

✔ Answer:
- Left side: Carbon dioxide + Water
- Right side: Glucose + Oxygen

*(Note: Sometimes “sugar” or “food” is used instead of glucose — both are acceptable at this level.)*

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## 🍃 2. Inputs to the Leaf (Arrows pointing INTO the leaf)

There are 3 inputs shown:

A. From the Sun (top left)

→ This represents light energy (sunlight).

✔ Label: Light energy / Sunlight

B. From the lungs (left middle) — air exchange

→ This shows carbon dioxide (CO₂) being taken in from the atmosphere via stomata.

✔ Label: Carbon dioxide

C. From the roots (bottom left) — water uptake

→ Roots absorb water (H₂O) from the soil and transport it to leaves.

✔ Label: Water

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## 🌿 3. Where does it happen? (Box inside leaf)

> “in the leaf cells of plants and other producers”

Photosynthesis occurs in chloroplasts, specifically using the pigment chlorophyll to capture light.

✔ Label: Chloroplasts (or “Chlorophyll” — but “chloroplasts” is more accurate as the organelle where it happens)

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## 💨 4. Outputs from the Leaf (Arrows pointing OUT of the leaf)

There are 2 outputs shown:

A. To the lungs (right middle) — gas exchange

→ Plants release oxygen (O₂) as a byproduct, which animals breathe in.

✔ Label: Oxygen

B. To the molecule diagram (right bottom) — glucose molecule

→ The molecular model shown is glucose (C₆H₁₂O₆) — the sugar/food made during photosynthesis.

✔ Label: Glucose (or “Sugar” or “Food”)

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## 🎯 5. Purpose of Photosynthesis (Bottom Arrow Box)

> “The purpose of photosynthesis is…”

Photosynthesis allows plants to make their own food (glucose) using sunlight, water, and carbon dioxide. This food provides energy for growth and life processes. It also produces oxygen, which supports animal life.

✔ Answer:
> To produce food (glucose) for the plant and release oxygen into the atmosphere.

*(Alternative phrasing: “To convert solar energy into chemical energy stored in glucose.”)*

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## ✔ Final Completed Worksheet Answers:

Top Equation:

Carbon dioxide + Water → Glucose + Oxygen
*(with “Light energy” above the arrow)*

Input Boxes (left side):

- Top: Light energy
- Middle: Carbon dioxide
- Bottom: Water

Inside Leaf:

Chloroplasts

Output Boxes (right side):

- Top: Oxygen
- Bottom: Glucose

Purpose Box:

To produce food (glucose) for the plant and release oxygen into the atmosphere.

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## 🌱 Why This Matters:
Photosynthesis is the foundation of most food chains. It converts solar energy into usable chemical energy, sustains plant life, and produces the oxygen we breathe. Without it, life on Earth as we know it would not exist.

Let me know if you’d like a printable version or a diagram explanation! 🌿☀️