Halloween at The Compton Science

In Science Club, on Wednesday, our wonderful future biologists used their knowledge of diffusion and variables to investigate where a shark would eat an individual that is  bleeding first, in the UK (cold water) or Australia (warm water). First, they had to make their own sharks out of aluminium foil and carefully stick them to one side of the beaker using blue tack. They then added water at different temperatures into three large beakers. 

To ensure that their experiment was fair, our future biologists measured the same volume of water each time. Next, they added three drops of human blood (red food colouring) into each beaker and timed how long it took for the blood to diffuse throughout the water and reach the shark’s nares (nostril-like openings). They found that human blood diffused the fastest in warm water as particles have more energy, so they move and spread out faster than particles in the cold water. They concluded that the individual would be eaten first in Australia!