METHOD

//**Lets create a method collaboratively.....**//

 * Method: **
 * 1)  Choose a piece of Elodea about 10cm long. Place the plant, bubbling end upwards, in a 300ml beaker filled with 250ml of room-temperature tap water. Use a pair of scissors to cut the lower end of the stem while completely submerged underwater.
 * 2) Wrap the beaker completely with black paper, cutting a 2cm-wide slit down one side of the beaker.
 * 3) Add a small amount of hydrogen carbonate powder.
 * 4) Stand the beaker in a water bath to reduce temperature changes in the experiment. Check the temperature periodically throughout the experiment.
 * 5) Fill photosynthometer with tap water, ensuring no bubbles are trapped in the measurement area.
 * 6)  With the room blacked out, position a light source 5cm perpendicular to the plant allowing 2 minutes to acclimatize with the Elodea's surrounding environment.
 * 7) Push the syringe as far forward as possible, wait for the plant to produce bubbles at a steady rate and adjust to surroundings for about 2 minutes and connect the cut end of the Elodea to the apparatus's flared opening (diagram below). Start the stopwatch.
 * 8) After 5 minutes, take out the Elodea from the apparatus's flared opening and make sure it remains submerged, so that no bubbles will accumulate. Slowly and gently draw the syringe back to draw the gas bubbles into the capillary tube then use a ruler to measure the length of the bubble.
 * 9) Repeat the previous 3 steps but increase the distances from 5cm to 10cm, 20cm, 50cm.