Photosynthesis: How Plants Feed Earth
Year 11 Biology Understanding the process that sustains all life
Think About This...
What would happen to Earth if all plants suddenly disappeared? Take 30 seconds to discuss with a partner
What is Photosynthesis?
Plants make their own food using sunlight They combine sunlight, water, and carbon dioxide This process creates glucose (sugar) and oxygen It happens mainly in the leaves
The Photosynthesis Equation
What Plants Need vs. What They Make
{"left":"Sunlight (energy source)\nWater (from roots)\nCarbon dioxide (from air)\nChlorophyll (green pigment)","right":"Glucose (plant food)\nOxygen (released to air)\nEnergy for growth\nBuilding blocks for plant structure"}
Why Photosynthesis Matters to ALL Life
Creates oxygen that all animals need to breathe Forms the base of all food chains on Earth Removes carbon dioxide from the atmosphere Provides food, fuel, and materials for humans
Photosynthesis in Action Demonstration
Observe two mint sprigs in water One in sunlight, one covered with foil Predict what will happen after 5 minutes Discuss the differences you observe
Remember This Key Fact
'Without photosynthesis, life as we know it would not exist on Earth'