Photosynthesis is the process by which plants use sunlight, carbon dioxide and water to produce oxygen and glucose, which is the plant's food. It occurs in the leaves of plants, where the plant uses light energy to convert carbon dioxide and water into glucose and oxygen. Glucose provides energy for the plant to grow and is stored in the leaves and other parts. Photosynthesis also produces oxygen that humans and other animals need to breathe.

1. Photosynthesis
Grade4

2. The student will:
• Learn what photosynthesis is and
how it helps plants.
• Learn what a plant needs for
photosynthesis.

3. What is photosynthesis?
• Plants make their own food. This
process is called photosynthesis.

4. Where does photosynthesis
occur?
• Photosynthesis occurs in the
leaves of a plant.

5. What is needed for
photosynthesis to occur?
• Light is needed for photosynthesis to
occur. The plant’s leaves use the light
to make a sugar called glucose.

6. Why do plants need glucose?
• Glucose is the food for the plant. It
gives the plant energy to grow.

7. How much glucose does a
plant make?
• Plants make enough glucose to be used during the night and
on cloudy days when they don’t get sunlight. The extra
glucose is stored in the plant’s leaves and other parts.

8. How does photosynthesis
help us?
• During the process of photosynthesis,
oxygen is produced. We use this
oxygen to breathe.