Photosynthesis Experiment Analysis

Mr. Kobe conducts a makeup lab experiment using bromothymol blue, an acid indicator, to demonstrate the effect of carbon dioxide on the solution's color. He sets up four tubes with different conditions, including the presence of an aquatic plant, Elodea, and varying light exposure. After 24 hours, he observes the color changes in the tubes, explaining the results and encouraging students to analyze the outcomes based on their lab handout.

What is the role of bromothymol blue in the experiment?

• It is a catalyst for the reaction.

• It is used to measure temperature changes.

• It acts as a base indicator.

• It serves as an acid indicator.

What happens to the color of bromothymol blue when carbon dioxide is introduced?

• It changes to a greenish color.

• It remains blue.

• It turns red.

• It becomes transparent.

Which plant is used in the experiment to observe the effect of photosynthesis?

• Elodea

• Fern

• Moss

• Cactus

How many tubes contain the Elodea plant in the experiment?

• Three

• Two

• One

• Four

What is the initial color of the solution in all tubes before the experiment begins?

• Green

• Yellow

• Blue

• Yellow-green

Which tubes are exposed to sunlight during the experiment?

• Tubes 1 and 3

• Tubes 2 and 4

• Tubes 1 and 2

• Tubes 3 and 4

What is the expected outcome for tube 2 after 24 hours?

• No color change

• Turns red

• Turns blue

• Becomes transparent

What was the observed color change in tube 1 after 24 hours?

• It turned blue.

• It became transparent.

• It remained yellow-green.

• It turned red.

Which tube showed a significant color change back to blue?

• Tube 3

• Tube 2

• Tube 1

• Tube 4

What should students do after observing the experiment results?

• Prepare a presentation.

• Conduct a similar experiment at home.

• Complete the analysis questions.

• Write a report on the experiment.