This week, we have been talking about the air. We started learning about different gases that are in the air, air quality, the nitrogen cycle, and even a bit about gases that pollute, acid rain and the greenhouse effect. An experiment is sitting on our window sill right now. We took a piece of concrete, put it in a big glass, and added vinegar to cover it. We are supposed to leave that for a couple of days and see how acids affect building materials.
Fairy has been making her own list of chemical elements and their codes as we come across new ones. We have been watching videos from the University of Nottimgham, try this great link : The Periodic Table of Videos. Below you can watch the one on helium.