Learn: Photosynthesis

Welcome!Today we'll learn about photosynthesis, a process essential for plants and life on Earth. We'll explore what it is, how it works, and why it's important.

What is Photosynthesis?Photosynthesis is the process by which plants use light energy to convert carbon dioxide and water into glucose and oxygen. It takes place in the chloroplasts within plant cells, which contain chlorophyll to absorb light.

The Photosynthesis EquationPhotosynthesis can be summarised with the word equation: Carbon dioxide + Water → Glucose + Oxygen. This process requires light and chlorophyll.

Chloroplasts and ChlorophyllChloroplasts are specialised plant cell structures where photosynthesis occurs. They contain chlorophyll, a green pigment that captures light energy for the process.

Limiting FactorsThe rate of photosynthesis can be affected by limiting factors such as light intensity, carbon dioxide concentration, and temperature. If any of these is in short supply, photosynthesis slows down.

Leaf Structure and PhotosynthesisLeaves are adapted for photosynthesis with a large surface area, thin structure, and the presence of stomata for gas exchange. The palisade layer contains many chloroplasts to maximise light absorption.

Uses of GlucosePlants use the glucose produced in photosynthesis for respiration to release energy, storage as starch, and synthesising other molecules like cellulose for growth.

Review Time!Great work! You've learned about photosynthesis, its process, limiting factors, and leaf adaptations. Now let's check how much you've understood.