Wednesday, December 21, 2011

Photosynthesis dry lab

In this lab we didn't actually do it, we just did a write up. Doing this you realize that it's pretty had to to a lab without actually doing it. In this lab the facts were:

  • Carbon dioxide in water produces carbonic acid
  • BTB is a blue green liquid which changes to a yellow color in acid and back to blue green when returned to a neutral pH.
  • Carbon dioxide and water yields star and oxygen when chlorophyll and sunlight are present
  • animals respire
  • Green plants photosynthesize in the light and respire all the time. 
  • Sugar and oxygen yields carbon dioxide and water and energy.
  • Elodea is in the kingdom planate and is a producer.



     Interpreting the observations, i got that

  1. water + BTB----> neutral pH-----> blue green. This means that if you have water plus BTB, it is a neutral pH, which keeps you at a blue green color.
  2. Fish----> respire -----> sugar + O2 + CO2 + H2O----> CO2 in H2O----> acid----> yellow. This means that the fish respires and gives off sugar and oxygen, carbon dioxide and water. The carbon dioxide and water all make an acid which makes the color yellow.
  3. In this one lodes is in kingdom planate and is a producer. Green plants photosynthesize in light and respire all the time. Which makes carbon dioxide and water yield and sugar and oxygen wen chlorophyll and sunlight are present.  BTB is blue green liquid which changes to a yellow color in acid and back to blue green when neutral.  So it is blue green in light and yellow when left in the dark for 3 hours. 
  4. Elodea is pale blue green in light and yellow when left in the dark for 3 hours. The animal is doing desperation, giving off carbon dioxide and giving off BTB acid making it yellow. The plant does something different though. The plant picks up the carbon dioxide and stays blue green, not making any acid. 

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