Photosynthesis_Cell+Respiration+Lab_rev 1

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Photosynthesis and Cellular Respiration Lab Worksheet Part One: Observing Evidence of Photosynthesis 1.1 What does bromothymol blue (BTB) detect in a solution? (5 pts) 1.2 What does "breathing" into the flask with water and BTB do in the experiment? (5 pts) 1.3 Complete the table below to compare each experimental trial. (15 pts) Test Tube #1 Test Tube #2 Test Tube #3 What plant is present? What plant is present? What plant is present? What was in the solution? What was in the solution? What was in the solution? Light source? Light source? Light source? Color before? Color before? Color before? Color after? Color after? Color after?

1.4 What does placing a stopper in the top of each test tube do? Why would this be necessary in the experiment? (5 pts) 1.5 Did the Elodea plant kept in the dark produce oxygen? Why or why not? Justify your answer based on the lab data. (5 pts) 1.6 Summarize the outcome of this experiment in your own words; what was tested for and what was the outcome? (5 pts) Part Two: Bubbling Plants to Quantify Photosynthesis 2.1 Write a hypothesis: Does the amount of light change the amount of photosynthesis a plant produces? (5 pts)

2 .2 What was the purpose of the sodium bicarbonate (baking soda) being mixed into the solution? (5 pts) 2.3 What was the rate of photosynthesis once the light was on (how many bubbles did you count)? (5 pts) 2.4 Why did the plants in the video produce bubbles when placed near a light source but not before? (5 pts) 2. 5 How does this demonstrate that plants release oxygen during photosynthesis? Explain your answer based on your observations. (5 pts) Part Three: How To Make Oxygen at Home 3.1 Why did the scientist place a burning flint into the test tube before submerging the test tube in the beaker? Hint: What must be present for fire to burn? (5 pts)

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3.2 Why was it important that the water level in the beaker be above the stem of the funnel in this setup? What would happen if it was not? (5 pts) 3 . 3 Compare contrast this experiment in Part 3 with the "bubble counting" experiment in Part 2 of the exercise. How were they similar and how were they different? What did each experiment demonstrate? (5 pts) 3.4 What do you think would happen if we added more sodium bicarbonate to the solution? Hint: What does the sodium bicarbonate do in the process? (5 pt)

Part Four: Parts and Purpose of the Chloroplast 4.1 Use the diagrams in the lesson to identify the following structures of the chloroplast. Type the number of the structure into the field by its name. (6 points) Outer Membrane Inner Membrane Granum Thylakoid Stroma Ribosome Image:https: commons.wikimedia.org wiki File:Chloroplast drawing numb.svg CC Attribution International 4. https: creativecommons.org licenses by sa 4. deed.en 4.2 Answer the following prompts about the process of photosynthesis in the chloroplast. (4 pts) Phase of process where light energy is absorbed: Molecules that transfer energy in the process: Phase of the process where glucose is produced: Three carbon molecules used to make glucose: 4.3 Why is it misleading to call the second part of photosynthesis "dark reactions"? (5 pts)

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