Do some rocks have crystals in? (Thomas Barnard)
What are rocks are made of? (Violet)
Can rocks break? (Matthew)
This week we learnt about the 3 different types of rocks
Igneous:Igneous rock forms when molten rock cools and solidifies.
Sedimentary: Sand, mud and even the remains of living animal can turn into rocks. These sediments settle on the sea floor, building up in layers. Over time the layers are compressed and as a result the sediment becomes a rock.
Metamorphic:Deep underground, rock can be subjected to heat and pressure. These forces, while not melting the rock completely can cause minerals to recrystallise and results in a hard, crystalline rock called metamorphic rock.
Today we carried out an investigation to find out if the rocks floated, were waterproof and reacted to vinegar. We watched the chalk fizz in the vinegar and saw lots of the rocks sink.
We have used a song to help us remember, have a practice at home!