23rd November 2020 | barneywolstenholme Team 3 have been learning about rocks in Science for the past week. We have learnt about the three main types of rocks (igneous, sedimentary and metamorphic) and how they are formed. Each rock is unique. Some rocks are permeable, which means that water and gas can pass through them. Other rocks are impermeable. Some rocks are hard, whilst others are brittle. Today, Team 3 got to investigate the permeability and hardness of rocks for themselves. We tested for permeability by pouring droplets of water using a pipette, and we tested whether rocks were brittle by scratching them with sandpaper and seeing how much rock dust came off. Each student wrote down their method. In order to be thorough geologists, we also explained how we would keep it a fair test, by dropping the same amount of water on each rock and by scratching each rock with sandpaper exactly the same number of times. We then wrote up our results onto a Carroll diagram.