Photosynthesis Dry lab

Procedures
1. Add 3ml of water and 3ml of bromothymol blue, blow through a straw to form bubbles and Observe and explain what happens.

2. Add 3ml of water and 3ml of bromothymol blue but this time add in an aquarium snail.Let the snail sit for about an hour or so if nothing happens stir up and see. Observe what happens.

3. Add 3ml of water and 3ml of bromothymol blue. Then add 3 elodea and 2 aquarium plants. Leave in light for 3 hours and Observe what you see.

4. Add 3ml of water and 3ml of bromothymol blue. Add a snail 4 elodea. Leave in light for 15 minutes. Observe and see what happens, then remove from light and leave in dark for 3 hours. Observe and see what happens.

Observations
Bromothymol blue is a blue-green liquid which changes to a yellow color in acid and back to blue-green when returned to a neutral pH Deals with the first step. Also with the 2nd and the 4th step.

Animals respire deals with step 2 just because a snail is added.

Sugar plus oxygen yields carbon dioxide plus water energy has to deal with step 4. Its in light which has the energy in it.

Carbon Dioxide plus water yields sugar and oxygen when chlorophyll and sunlight are present has to deal with step 4 as well due to sunlight.

Carbon dioxide in water produces carbonic acid deals with step 1.
Questions
1. Why does Carbon Dioxide turn water colors?
2. How do Plants breathe under water?
3. What effect does the snail have when it it added in the bromothymol blue and water