Photosynthesis and Cellular Respiration Mini-Lab

9(B) compare the reactants and products of photosynthesis and cellular respiration in terms of energy and matter;

Name:

Period:

1.Write the formulas for photosynthesis and cellular respiration in your BILL Book

2.Indicators:

Copy the chart below into your BILL Book and summarize the action of bromothymol blue.

Bromothymol Blue is a pH indicator that turns from blue to yellow in the presence of an Acid. When CO2 (carbon dioxide) combines with water it forms a weak acid which will turn the solution ______. Excess CO2 can be an indicator of ______occurring.

Color / CO2 present
(yes/no)
Yellow
Blue

9(B) compare the reactants and products of photosynthesis and cellular respiration in terms of energy and matter;

OriginalSetup

9(B) compare the reactants and products of photosynthesis and cellular respiration in terms of energy and matter;

waterandBromothymolblue

water,Bromothymolblue,andplant

water,Bromothymolblue,andsnail

water,Bromothymolblue,plant,andsnail

9(B) compare the reactants and products of photosynthesis and cellular respiration in terms of energy and matter;

**all test tubes start out BLUE

Copy and color the original setup in your book

The four test tubes were placed in sunlight for 48 hours.When the test tubes were observed at the end of the 48 hours, the following changes had occurred. Sketch and color your observations in your BILL Book.

Write out the question and answer it in your BILL Book

3.What cellularprocess took place to cause the color changefrom blue to yellow in Tube S-3 containing water, Bromothymol blue, and a snail?

4.Why did the other test tubes containing water, Bromothymol blue, and plants not change color?

5.Four more test tubes were set up the same as the original four. These test tubes were placed in a dark room for 48 hours. Sketch and color the results at the end of 48 hours of dark.

6.What process caused the liquids to change from blue to yellow?

7.What product in the formula is responsible for the color change

Examine the two test tubes below.

9(B) compare the reactants and products of photosynthesis and cellular respiration in terms of energy and matter;

Sunlight48hours

S-4

Dark48hours

D-4

9(B) compare the reactants and products of photosynthesis and cellular respiration in terms of energy and matter;

water,Bromothymolblue,plant,andsnail BLUE

water,Bromothymolblue,plant,andsnail YELLOW

9(B) compare the reactants and products of photosynthesis and cellular respiration in terms of energy and matter;