1.1. A student investigated photosynthesis of algae by placing some algae in water with a light shining onto the algae.

The water contained a dissolved gas necessary for photosynthesis to occur.

Name the dissolved gas.

1.2. As photosynthesis occurred, gas bubbles were seen and the resulting gas was collected.

Describe a test that could be performed to identify the gas collected.

Give the results of the test.

1.3. The student increased the light intensity which was shining on the beaker containing algae and water.

How would the observations the student would make be different after increasing the light intensity?

Explain your answer.