How does temp affect diffusion
1. Fill a Petri dish with cold water and record the temperature
2. Place the Petri dish on some 1cm2 graph paper
3. Using a pipette, put 1 cm3 of food dye into the centre of the Petri dish
5. Stop the stop watch after 1.5 minutes and workout the area covered by the food dye
6. Repeat the experiment twice more, using fresh cold water, so that you can calculate an average
7. Repeat steps 1-6 for warm water from the tap and hot water from the kettle. The temperature of the water should be similar to the temperatures in the table below. Use a thermometer to check
