mini assessment

• carbon dioxide + water -(light)-(chlorophyl)-> glucose + oxygen
• 6CO2 + 6H2O -> C6H12O6 + 6O2
• factors that affect the rate of photosynthesis are light intensity, carbon dioxide concentration, temperature, water availability, chlorophyll concentration, and nutrient availability. 
• What is the first step in the pondweed practical method?

  Attach the boiling tube to the clamp stand
• How far should the light source be positioned from the boiling tube?

  10 cm
• What solution is used to fill the boiling tube?

  Sodium hydrogen carbonate solution
• What should be done to the pondweed before placing it in the boiling tube?

  Cut around 1 cm off the top
• What is the next step after placing the pondweed in the boiling tube?

  Gently push the pondweed down
• How long should the boiling tube be left to rest?

  5 minutes
• What should be done after starting the stopwatch?

  Count the number of bubbles produced
• How many times should step 7 be repeated for each light intensity distance?

  Twice more
• What should be done with the results after counting bubbles?

  Record results in a table
• What should be done after recording results for the first distance?

  Repeat steps 7-9 for two more distances
• What are the two additional distances to test in the experiment?

  20 cm and 30 cm
• What type of graph should be plotted at the end of the experiment?

  Rate of photosynthesis against light intensity
• glucose is required for respiration.
• glucose can be stored as starch.
• glucose can be used to make fat and oil. plants can covert glucose into lipids for storage in seeds.
• glucose makes cellulose (provides the plant cell walls with strength.)
•  glucose can be used to make amino acids. One of the other uses of glucose in plants is that it is used to make these amino acids which are then put together to make proteins.