Learning about rocks with Mrs Deacey
This morning, Y3 pupils were taken to Camborne Science Academy to learn more about rocks. Miss Deacey met us, and asked us what we knew already about rocks. We were excited to show her the gestures we make with our hands for igneous, metamorphic and sedimentary. We enjoyed exploring the 3 different types of rock using hand lenses.
These are formed from lava. Deep under the ground it is very hot, so it heats up the rocks. When rocks are heated up so much, they melt: this is called magma. The magma liquid takes up more space than the solid rocks and can push up out of the ground: this is called volcanoes. When the molten rock flows out of volcanoes, it is called lava. When lava cools and solidifies, it is called igneous rock. We did an experiment to demonstrate this.
These rocks are made up of crystals: if the rock cools quickly, the crystals are small, whereas if the rocks cool more slowly the crystals are larger.
These are rocks that change form over time by pressure being squeezed together, or heat.
These rocks are caused by layers of sediment squashing together to form rock. These weigh lighter than the other rock because they have air spaces between layers. These rocks are porous, which means they have small holes that allow then to soak up liquid. We did an experiment to show this. Fossils can be found in sedimentary rock. Dead animals sink to the bottom of the sea bed, or lie on mud then layers of sediment forms around them and forms rock around the skeleton of the dead animal. We made fossils and brought these back to school.
We will post a picture once they solidify!