Under which conditions is photosynthesis most efficient?

ASMS Year 12 Biology students have designed their own experiments to test factors that affect photosynthesis, the process used by plants, algae and certain bacteria to harness energy from sunlight and turn it into chemical energy.

Students investigated the concentration of carbon dioxide, availability of water, presence or absence of light, the temperature of the environment, and the concentration of chlorophyll.

In this task, students designed a procedure and implemented their investigation to determine how one factor could affect the rate of metabolism.
Then, students measured the rate of photosynthesis either by measuring the volume/amount of carbon dioxide taken in, or the volume/amount of oxygen being released.