hi, i am a student teacher and i have an interview next week and they have asked me to teach a how science works lesson. its one hour long to year 10 and want me to carry out a practical and draw a graph. Can you think of any straightforward practicals that doesnt involve lots of health and safety or lots of equipment? i also would like to do a chemistry practical as even though i am a biologist, biology practicals are usually slow and unreliable, and i hate physics! Any ideas would be much appreciate. thanks.