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Rocks and stones are solid minerals. There are many different types. You may have used chalk on a blackboard but did you know that chalk is a rock? Different rocks have different properties. One kind, pumice, can even float! Basalt is one of the most common rocks on Earth because most of the ocean's floor is made from it. The Giant's Causeway, a famous tourist attraction located in Northern Ireland, is formed from hexagonal basalt columns. These columns formed entirely naturally from cooling lava after an ancient volcanic eruption.
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Organic usually means to do with living things
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'Metamorphosis' means 'to change form'. Diamonds, which are formed from carbon, are examples of metamorphic rocks
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Limestone is an example of sedimentary rock
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Granite is an example of an igneous rock
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Pumice can float because its density is so low - less than that of water!
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The famous White Cliffs of Dover are made of chalk
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Aberdeen in Scotland is known as Granite City because of the abundance of the rock found there. Aberdeen granite was used to build the House of Parliament in London
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Sedimentary rocks are formed when layers of mud, dust or shells (sediment) are placed under great pressure from the layers of sediment above them. Living organisms which fall into underwater sediment may eventually become fossils
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A rock's permeability means how well it allows water to pass through it
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Slate weathers very well and doesn't let the rain through - these are perfect qualities for a roof
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