Split worksheet designed to help students compare and contrast the inputs and outputs of photosynthesis and cellular respiration.

The image provided is a graphic organizer comparing photosynthesis and cell respiration. The task is to fill in the blanks for the reactants and products of both processes, as well as provide their definitions. Below is the solution with explanations:

---

Photosynthesis

#### Definition:
Photosynthesis is the process by which plants, algae, and some bacteria convert light energy (from the sun) into chemical energy stored in glucose. Oxygen is released as a byproduct.

#### Reactants:
- Carbon dioxide (CO₂): Absorbed from the atmosphere.
- Water (H₂O): Absorbed from the soil through roots.
- Light energy (sunlight): Captured by chlorophyll in the chloroplasts.

#### Products:
- Glucose (C₆H₁₂O₆): A sugar that serves as an energy source for the plant.
- Oxygen (O₂): Released into the atmosphere as a byproduct.

---

Cell Respiration

#### Definition:
Cell respiration is the process by which cells break down glucose in the presence of oxygen to produce energy (ATP), carbon dioxide, and water. It occurs in the mitochondria of cells.

#### Reactants:
- Glucose (C₆H₁₂O₆): Derived from photosynthesis or consumed as food.
- Oxygen (O₂): Absorbed from the atmosphere or dissolved in water.

#### Products:
- Carbon dioxide (CO₂): Released into the atmosphere.
- Water (H₂O): Released as a waste product.
- Energy (ATP): Used by the cell for various metabolic activities.

---

Filling in the Graphic Organizer

#### Photosynthesis Section:
1. Reactants:
- Carbon dioxide (CO₂)
- Water (H₂O)
- Light energy (sunlight)

2. Products:
- Glucose (C₆H₁₂O₆)
- Oxygen (O₂)

3. Definition:
Photosynthesis is the process by which organisms use sunlight to convert carbon dioxide and water into glucose and oxygen.

#### Cell Respiration Section:
1. Reactants:
- Glucose (C₆H₁₂O₆)
- Oxygen (O₂)

2. Products:
- Carbon dioxide (CO₂)
- Water (H₂O)
- Energy (ATP)

3. Definition:
Cell respiration is the process by which cells break down glucose in the presence of oxygen to produce energy (ATP), carbon dioxide, and water.

---

Final Filled-in Graphic Organizer:

| Photosynthesis | Cell Respiration |
|---------------------|----------------------|
| Reactants | Carbon dioxide (CO₂), Water (H₂O), Light energy (sunlight) | Glucose (C₆H₁₂O₆), Oxygen (O₂) |
| Products | Glucose (C₆H₁₂O₆), Oxygen (O₂) | Carbon dioxide (CO₂), Water (H₂O), Energy (ATP) |
| Definition | Photosynthesis is the process by which organisms use sunlight to convert carbon dioxide and water into glucose and oxygen. | Cell respiration is the process by which cells break down glucose in the presence of oxygen to produce energy (ATP), carbon dioxide, and water. |

---

Explanation of the Relationship Between Photosynthesis and Cell Respiration:

- Photosynthesis produces glucose and oxygen, which are essential for life on Earth.
- Cell respiration uses the glucose produced during photosynthesis to generate energy (ATP) for cellular activities.
- These two processes are interconnected and complementary:
- Photosynthesis captures energy from the sun and stores it in glucose.
- Cell respiration releases the stored energy in glucose to power cellular functions.

This cycle ensures the flow of energy and matter in ecosystems.

---

Final Answer:

$$
\boxed{
\text{See the filled-in graphic organizer above.}
}
$$