The simplest kind of weather station for KS1
Make pine cone weather stations with your class, and see how well they do at telling whether it is raining or not!
More experiments and demonstrations
Ocean Acidification Experiment
Use dry ice and universal indicator to explore ocean acidification
Particulate Matter, ice, albedo and melting – Teacher’s Notes
Particulate Matter and aerosols are made up of a variety of pollutants, some of them enhancing and some counteracting the greenhouse effect when they are in the atmosphere.