3.2.3 Photosynthesis

• Photosynthesis is the process by which plants convert carbon dioxide and water into glucose and oxygen using light energy
• Match the reactants and products of photosynthesis:

  Carbon Dioxide ↔️ Glucose

  Water ↔️ Oxygen
• What is the balanced chemical equation for photosynthesis?

  6CO₂ + 6H₂O + Light Energy → C₆H₁₂O₆ + 6O₂
• What happens to photosynthesis if light intensity is too low?

  Rate decreases
• Controlling variables is crucial for accurate photosynthesis measurements.


  True
• Light energy is used to combine carbon dioxide and water
• What is the balanced chemical equation for photosynthesis?

  6CO₂ + 6H₂O + Light Energy → C₆H₁₂O₆ + 6O₂
• Higher light intensity increases the rate of photosynthesis until a certain threshold
• Match the factor with its optimal condition and impact on photosynthesis:

  Light Intensity ↔️ High: Increases rate until saturation

  CO₂ Concentration ↔️ High: Increases rate until enzymes are saturated

  Temperature ↔️ Moderate: Peaks at optimal temperatures
• Controlling variables like light intensity, CO₂ levels, and temperature is crucial for accurate photosynthesis measurements.


  True
• Using lamps with adjustable wattage is a method to control light intensity in photosynthesis experiments.


  True
• What happens to the photosynthesis rate as light intensity increases in photosynthesis experiments?

  Increases until it levels off
• Glucose produced during photosynthesis stores energy for plants.


  True
• The overall equation for photosynthesis is 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂


  True
• The products of photosynthesis are glucose and oxygen
• Chlorophyll is essential for photosynthesis.

  True
• Arrange the factors affecting photosynthesis in order of their influence:

  1️⃣ Light Intensity

  2️⃣ Carbon Dioxide Concentration

  3️⃣ Temperature
• A light source in a photosynthesis experiment provides the necessary light energy
• The products of photosynthesis are glucose and oxygen
• What is the summary of photosynthesis in terms of reactants and products?

  Carbon dioxide and water into glucose and oxygen
• Carbon dioxide and water are combined in photosynthesis using light energy to produce glucose and oxygen.


  True
• Elevated carbon dioxide levels can boost photosynthesis until enzymes become saturated.


  True
• What is the purpose of a light source in a photosynthesis experiment?

  Provides light energy
• What is the rationale for using adjustable wattage lamps in photosynthesis experiments?

  Ensures consistent energy input
• What does the oxygen production method measure in photosynthesis experiments?

  Oxygen released by plants
• Photosynthesis is the process by which plants convert carbon dioxide and water into glucose and oxygen using light energy.


  True
• How does temperature affect the rate of photosynthesis?

  Peaks at optimal temperatures
• Elevated carbon dioxide levels can boost photosynthesis indefinitely.

  False
• A light source in a photosynthesis experiment provides necessary light energy
• To maintain a stable CO₂ supply, photosynthesis experiments may use CO₂-enriched air
• Match the method for measuring photosynthesis with its key aspect:

  Oxygen Production ↔️ Monitors O₂ levels with sensors

  Carbon Dioxide Consumption ↔️ Tracks CO₂ uptake with sensors
• Too high or too low temperatures can inhibit photosynthesis due to enzyme dysfunction
• Variations in light intensity, CO₂, and temperature are key sources of error in photosynthesis investigations
• Calibrated sensors should be used in photosynthesis investigations to reduce systematic errors.


  True
• Photosynthesis converts carbon dioxide and water into glucose and oxygen
• What is the green pigment in plants that facilitates photosynthesis?

  Chlorophyll
• What are three key factors that influence the rate of photosynthesis?

  Light intensity, CO₂ concentration, temperature
• Measuring oxygen production during photosynthesis is a direct method to assess photosynthetic output.


  True
• The carbon dioxide consumption method reflects the plant's carbon assimilation.


  True
• Why is it necessary to control confounding variables in photosynthesis experiments?

  To isolate the effect