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Last term in science, we were studying different types of rocks and their formations. You know those ordinary pieces you see on the ground everyday could be millions, if not billions of years old? They are also quite interesting to learn about.
The three types of rocks we explored were: metamorphic, igneous and sedimentary rocks.
Metamorphic rocks:
Metamorphic rocks are rocks made from heat and pressure. They are a mix of sedimentary and igneous compacted.
Igneous rocks:
Igneous rocks are formed from lava or magma cooling. The size of their crystals vary based on how long they take to cool.
Sedimentary rocks:
Sedimentary rocks are rocks that are compacted together in layers by pressure.
When we talk about the difference between magma and lava - lava is what we call the substance when it is inside the volcano. When it leaves the volcano, it is called magma. When rocks are compacted together, it means they have been pushed together and are bonded by intense pressure.
The rock cycle is a continuous process where rocks are transformed between igneous, sedimentary, and metamorphic types through various geologic processes. These transformations occur due to Earth's internal heat, pressure from tectonic processes, and the effects of water, wind, gravity, and biological activities.
Overall, learning about rocks was an engaging experience with practicals including getting to see and touch many different types of rocks.
Tsion Gebremeskel - Year 8 Science Prefect
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