This morning, 3LG have been investigating the different properties of rocks.
We started our investigations by scratching different types of rocks with our fingernails, a coin and a paperclip to test the hardness. We then tried dropping water onto the rocks to test whether they were permeable or impermeable. We finished by dropping vinegar on the rocks to see if they fizzed, showing us whether or not they contained calcium. These tests allowed us to decide whether the rocks were sedimentary, igneous or metamorphic.
