photosynthesis

• what is the equation for photosynthesis?

  Carbon dioxide + water + sunlight -> oxygen and Glucose
• What is photosynthesis?

  Photosynthesis is the process by which green plants convert carbon dioxide and water into glucose using light energy.
• Why is photosynthesis important for animals?

  Photosynthesis produces food for animals, either directly or indirectly.
• What role does oxygen play in photosynthesis?

  Oxygen is produced as a by-product of photosynthesis and is necessary for respiration.
• What do plants need to survive and carry out photosynthesis?

  Plants need carbon dioxide, water, light, and chlorophyll to survive and perform photosynthesis.
• What are the main components required for photosynthesis?

  • Carbon dioxide: Provides carbon for glucose
  • Water: Provides hydrogen and oxygen
  • Light: Provides energy for the reaction
  • Chlorophyll: Absorbs light needed for photosynthesis
• What is the role of chlorophyll in photosynthesis?

  Chlorophyll absorbs light energy necessary for photosynthesis.
• How do enzymes affect the process of photosynthesis?

  Enzymes control the chemical reactions involved in photosynthesis and require suitable temperatures to function.
• What are the two types of experiments related to photosynthesis?

  1. Experiments showing the need for light or carbon dioxide
  2. Experiments investigating the effect of various factors on the rate of photosynthesis
• What is the procedure for testing for starch in leaves?

  1. Dip the leaf in boiling water to kill cells.
  2. Place the leaf in boiling alcohol to remove green color.
  3. Dip the leaf in water to soften it.
  4. Drip brown iodine solution onto the leaf; a blue-black color indicates starch.
• Why do scientists de-starch leaves before experiments on photosynthesis?

  De-starching ensures that any starch present is formed during the experiment, not before.
• How can the need for light in photosynthesis be tested?

  By covering part of a leaf with foil or black paper and testing for starch after 24 hours.
• What does a blue-black color indicate when testing for starch?

  A blue-black color indicates the presence of starch in the leaf.
• How is carbon dioxide removed in experiments on photosynthesis?

  Carbon dioxide is removed using potassium hydroxide or sodium hydroxide, which absorbs it.
• What is the purpose of using a control experiment in photosynthesis studies?

  A control experiment helps to determine if the results are due to the experimental variable, such as the absence of carbon dioxide.
• What are the advantages of using sensors and data loggers in photosynthesis experiments?

  • Accurately measure oxygen and carbon dioxide levels
  • Monitor changes over time
  • Provide precise data for analysis
• What two essential materials does photosynthesis provide for animals?

  Photosynthesis provides glucose and oxygen for animals.
• What is the role of light in photosynthesis?

  Light provides the energy necessary for the chemical reactions in photosynthesis.
• Why do scientists keep the test plant in the dark for 24 hours before starting some experiments on photosynthesis?

  Keeping the plant in the dark ensures that any starch formed during the experiment is newly produced.
• Why is the leaf boiled in alcohol during starch testing?

  Boiling the leaf in alcohol removes the green coloring to make the color change visible.
• What substance is used to absorb carbon dioxide in some experiments on photosynthesis?

  Sodium hydroxide is used to absorb carbon dioxide in some experiments.
• What is the significance of using a control leaf in photosynthesis experiments?

  • Ensures accurate comparison
  • Confirms results are due to the experimental variable
  • Validates the experiment's findings