Questions and Answers
What is photosynthesis?
Plants use the sun's energy to convert water and carbon dioxide into sugars.
What is the photosynthesis equation?
6CO2 + 6H2O --> light energy --> C6H12O6 + 6O2
What provides the carbon atoms that are incorporated into sugar molecules in the Calvin cycle?
Carbon Dioxide (CO2)
What are stomata?
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What is a chloroplast?
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What is chlorophyll?
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What are the reactants of photosynthesis?
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What are the products of photosynthesis?
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What is an autotroph?
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What is a heterotroph?
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What does 'photo' mean in Latin?
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What does 'synthesis' mean in Latin?
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How many stages of photosynthesis are there?
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What is glucose?
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What is the role of roots in plants?
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Why do humans need photosynthesis?
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What is the light reactant needed for photosynthesis?
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What is water's role in photosynthesis?
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What is the chemical compound of water?
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What is the main source of energy for life on Earth?
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What do photosynthesizers produce that is needed by organisms?
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What is carbon dioxide?
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What is the function of water in plants?
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Study Notes
Photosynthesis Overview
- Process by which plants convert sunlight into chemical energy, producing sugars and oxygen.
- Key equation: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2.
Photosynthesis Components
- Carbon Dioxide (CO2): Source of carbon for sugar synthesis during the Calvin cycle.
- Water (H2O): Absorbed by plant roots; essential reactant in photosynthesis.
- Sunlight: Primary energy source that powers photosynthesis.
Photosynthesis Organs
- Chloroplasts: Organelles in plant and algae cells where photosynthesis occurs.
- Stomata (stoma): Small openings on leaf undersides that facilitate gas exchange.
Pigments and Energy
- Chlorophyll: Green pigment in chloroplasts crucial for capturing sunlight during photosynthesis.
Types of Organisms
- Autotroph/Producer: Organisms that produce their own food via photosynthesis.
- Heterotroph/Consumer: Organisms that obtain energy by consuming other living things.
Importance of Photosynthesis
- Key for oxygen production, essential for respiration in many organisms.
- Provides glucose, fundamental for energy in living systems.
Photosynthesis Process
- Consists of two main stages.
- The light-dependent reactions capture sunlight and convert it to chemical energy, while the Calvin cycle uses ATP and NADPH to produce glucose.
Key Terms
- Glucose: A simple sugar (C6H12O6) formed during photosynthesis.
- Reactants: Water, carbon dioxide, and sunlight are necessary for photosynthesis.
- Products: By-products of photosynthesis include glucose and oxygen.
Latin Roots
- Photo: Means "light".
- Synthesis: Means "putting together".
Human Dependency
- Humans rely on photosynthesis for oxygen and food, highlighting its critical role in sustaining life on Earth.
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Description
Test your understanding of photosynthesis with this 7th-grade quiz. Explore key concepts such as the photosynthesis equation, the role of carbon dioxide, and stomata. Perfect for students looking to reinforce their knowledge on plant energy conversion.