► Explain the diffusion of potassium permanganate in water as if I was teaching a pre-GCSE class.

► How does a small plant turn into a big tree?

► What is voltage and current?

► How does salt dissolve in water?

► When you bite an apple, what happens between your mouth and stomach?

► How does a microwave work? Why does the plate inside rotate?

► I throw a pen up in the air and it lands on the table - what are all of the forces acting on this pen?

► What is an X-ray is and how does it work (but imagine you're explaining it to an 11 year old)