PRACTICAL - Oxygen production shows the rate of photosynthesis

What substance do we use to test the rate of oxygen produced?

Canadian pondweed

How does the experiment work?

1) A source of white light is placed at a specific distance fro the pondweed
2) The pondweed is left to photosynthesise for a set amount of time. As it photosynthesises

How many times should the experiment be repeated?

Twice with the light source at the same distance and the mean volume of O2 produced is calculated

What is the relationship of light and distance via the practical?

As the distance increases

What is the inverse square law?

Light intensity decreases in proportion to the square of the distance. light intensity ∝ 1 / (distance (d) * distance (d))

What does the inverse square law mean?

If you halve the distance

What unit do you measure light intensity

1 / (d*d)