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Learn: Photosynthesis
Edexcel Combined Science GCSE
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Welcome!Today we'll learn about photosynthesis. This process is vital for plants and helps life on Earth by producing oxygen and glucose. Let's get started!
What is Photosynthesis?Photosynthesis is the process by which plants use sunlight, carbon dioxide, and water to make glucose (a type of sugar) and oxygen. It takes place in the chloroplasts of plant cells, which contain a green pigment called chlorophyll.
Why is Photosynthesis Important?Photosynthesis is essential because it provides the energy and food needed for plants to grow. It also produces oxygen, which all living organisms need to survive.
Quick check: What is the main product of photosynthesis?
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The Photosynthesis EquationThe chemical equation for photosynthesis is:Carbon dioxide + Water → Glucose + OxygenIn symbols: 6CO2 + 6H2O → C6H12O6 + 6O2This shows how plants convert light energy into chemical energy.
The {{blank0}} in plant cells absorbs light energy for photosynthesis.
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Factors Affecting PhotosynthesisThe rate of photosynthesis can be affected by:Light intensity: More light increases the rate.Carbon dioxide concentration: Higher levels can speed up photosynthesis.Temperature: Enzymes involved in photosynthesis work best at an optimum temperature.
Which of the following factors affect the rate of photosynthesis? (Select all that apply)
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ChloroplastsPhotosynthesis takes place in chloroplasts, specialised structures in plant cells. Chloroplasts contain chlorophyll, which absorbs light energy from the sun.
Match the items on the left with their correct pairs on the right
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Review Time!Great work! You've learned about photosynthesis, its importance, and factors affecting it. Now let's test your understanding with a few questions.
Where does photosynthesis occur?
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Carbon dioxide enters the plant through small openings called {{blank0}}.
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What are the products of photosynthesis? (Select all that apply)
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Match the items on the left with their correct pairs on the right
Start the lesson to answer this math equation question
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