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Rocks are abundant here on Earth. Interestingly, almost all rocks on Earth are 100 million years old. This suggests there is a process where rocks will form, decay and recycled again.
There are geological processes that govern the rock cycle. Our first stop is to look at the hot dense molten rock called magma.
Magma is situated under the Earth’s Surface. Due to the heat and pressure, any rock that will submerge is surely to melt. Rocks form under the surface of the Earth when the temperature of the hot rock will become cold enough for the particles to settle, and lose heat. It becomes dense and hard. Same processes also govern on molten rocks on the surface, whether it is cooled by an external source like water and air. These rocks are called Igneous rocks.
Some rocks form by different chemical processes and erosion. Sedimentary rocks are made from sediments from different kinds of rocks. Also, some rocks can transform into a different rock. These rocks are called Metamorphic Rocks. They transform from either Igneous or Sedimentary into a Metamorphic Rock due to an increase of heat and pressure.
Rocks are truly interesting to study with. We may throw them, build with them, hurt somebody by throwing a stone, or even crushing them to dump at the Manila Bay, rocks are truly useful in our daily lives.
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