30 Jan 2018
Ms Ling Ling Pin from PLC Sydney came 3rd overall and was awarded the Rowe Scientific Equipment Prize.
She was concerned about the effects on phytoplankton when sunscreen washes from swimmers.
Using an electronic balance, she tested the effect of the same amount of common sunscreens on samples of water. After filtering and staining the samples and viewing under a microscope she found that the zinc sunscreen led to the smallest decrease in the phytoplankton population.