Experiment 1 Contents of Test Tube Original Color Observed Color After 24 Hours Test Tube 1: BTB solution, blown into using a straw Yellow Yellow Test Tube 2: BTB solution, blown into using a straw, and Elodea Sprigs. Yellow Blue Test Tube 3: BTB solution, blown into using a straw, Elodea Sprigs and covered in foil. Yellow Yellow The above data is based on three trials. One being the control with only BTB solution that has been blown into with a straw. Another containing the BTB that has been blown into with a straw, and Elodea. The last containing the BTB that has been blown into with a straw, the Elodea, and covered in foil to block the light. Investigation 2 Experiment 2 Time Elapsed Test Tube 1 (In the Light) - Number of Bubbles Test Tube 2 (In the Dark) - Number of Bubbles 0 minutes 0 0 1 minute 20 1 2 minutes 31 0 3 minutes 32 0 4 minutes 31 2 5 minutes 32 1 The above data is based on two test tubes containing the same contents. Test tube one is in the light and test tube 2 is in the dark.
The purpose of this experiment is to investigate the production of bubbles by Elodea plants in the presence and absence of light.
In experiment 1, three test tubes were used. Test tube 1 contained BTB solution and was blown into using a straw. This served as the control. Test tube 2 contained BTB solution, Elodea sprigs, and was blown into using a straw. Test tube 3 contained BTB solution, Elodea sprigs, and was covered in foil to block the light.
After 24 hours, the observed colors of the solutions were recorded. Test tube 1 remained yellow, indicating that blowing into the BTB solution does not change its color. Test tube 2 turned blue, indicating that the Elodea plants produced oxygen, which reacted with the BTB solution. Test tube 3 remained yellow, indicating that the presence of foil blocked the light and inhibited the reaction.
In experiment 2, two test tubes were used. Both test tubes contained the same contents: BTB solution and Elodea sprigs. Test tube 1 was placed in the light and test tube 2 was placed in the dark.
The number of bubbles produced by the Elodea plants was recorded at different time intervals. In test tube 1 (in the light), there were 0 bubbles at the start, but the number increased to 32 bubbles after 5 minutes. In test tube 2 (in the dark), there were 0 bubbles at the start, and the number remained low throughout the experiment, with only 2 bubbles observed at 4 minutes.
This data suggests that Elodea plants produce more bubbles (indicating more oxygen production) in the presence of light compared to when they are in the dark.
What are we trying to prove?
Based on the provided information, it appears that the experiments were conducted to investigate the effects of light on the production of bubbles (indicating oxygen production) by Elodea plants. The goal was to determine whether the presence or absence of light influences the amount of oxygen produced by the plants. The hypothesis being tested could be that Elodea plants produce more oxygen in the presence of light, as photosynthesis is the process by which plants convert light energy into chemical energy, resulting in the production of oxygen.
Without the extra stuff, what we trying to prove?
Without the additional context, it is not clear what specific hypothesis or question the experiments are aiming to address. Based solely on the given information, it appears that the experiments were designed to observe the effects of light on the production of bubbles (indicating oxygen production) by Elodea plants. However, without further details or a specific research question, it is difficult to determine the precise goal or main objective of the experiments.
Make a list of all the items you used in this lab
Experiment 1:
- Test tube 1: BTB solution
- Test tube 2: BTB solution, Elodea sprigs
- Test tube 3: BTB solution, Elodea sprigs, foil
- Straw for blowing into the test tubes
- Foil for covering test tube 3 (if applicable)
Experiment 2:
- Test tube 1: BTB solution, Elodea sprigs (placed in the light)
- Test tube 2: BTB solution, Elodea sprigs (placed in the dark)
- Timer or stopwatch to measure time intervals
I did not do the experiement. They did it for me.
Apologies for the confusion. Here is a revised list of items used in the lab, as per the information provided:
Experiment 1:
- Test tube 1: BTB solution
- Test tube 2: BTB solution, Elodea sprigs
- Test tube 3: BTB solution, Elodea sprigs, foil
- Straw for blowing into the test tubes
- Foil for covering test tube 3 (if applicable)
Experiment 2:
- Test tube 1: BTB solution, Elodea sprigs (placed in the light)
- Test tube 2: BTB solution, Elodea sprigs (placed in the dark)
- Timer or stopwatch to measure time intervals
Please note that this list assumes that no other equipment or materials were mentioned or used in the experiments.
Write a paragraph or a list which explains what you did in the lab. (You will have 2 because you did 2 investigations)
Your procedure should be written so that anyone else could repeat the experiment.