A student set up two test tubes containing elodea plants and sodium bicarbonate and topped each of them with a volumeter. tube a was wrapped in aluminum foil. both tubes were placed

General
1

a student set up two test tubes containing elodea plants and sodium bicarbonate and topped each of them with a volumeter. tube a was wrapped in aluminum foil. both tubes were placed in a test tube rack in front of a lamp containing a bright white bulb. the student obtained the following data from her experiment. which of the following statements could explain this data?

2

LectureNotes said a student set up two test tubes containing elodea plants and sodium bicarbonate and topped each of them with a volumeter. Tube A was wrapped in aluminum foil. Both tubes were placed in a test tube rack in front of a lamp containing a bright white bulb. The student obtained the following data from her experiment. Which of the following statements could explain this data?

Experiment Data:

  • Tube A (wrapped in aluminum foil): The volume of gas increased.
  • Tube B (not wrapped in aluminum foil): No noticeable change in the volume of gas.

The observation that the volume of gas in Tube A increased while there was no noticeable change in Tube B is likely due to the different conditions the two test tubes were placed under. The aluminum foil wrapping on Tube A played a crucial role in this experiment. Here are potential statements that could explain this data:

  1. Photosynthesis Occurred: The aluminum foil wrapping around Tube A likely prevented light from reaching the elodea plants inside. As a result, the elodea plants in Tube A did not undergo photosynthesis or were limited in their ability to photosynthesize. In contrast, the elodea plants in Tube B, which were exposed to light, were able to perform photosynthesis using the light energy from the lamp.

  2. Light is Essential for Photosynthesis: The experiment data indicates that light is necessary for the process of photosynthesis to occur. The lack of a volume increase in Tube B suggests that without light, the elodea plants could not carry out photosynthesis effectively, leading to no significant gas production.

  3. Role of Sodium Bicarbonate: Sodium bicarbonate in both tubes serves as a carbon source for photosynthesis. The presence of sodium bicarbonate ensured that the elodea plants had access to the necessary carbon dioxide required for photosynthesis. However, the contrasting results between Tube A and Tube B highlight the importance of light in the photosynthetic process.

In conclusion, the data obtained from the experiment points towards the significance of light in the process of photosynthesis. The aluminum foil wrapping affecting the light exposure to the elodea plants in Tube A played a critical role in the differing gas volume observations in the two test tubes.