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Geography. The Story of Rocks!. By Bethany Parkinson 9MT. A rock is a compact mass of mineral matter. There are three main type's of rocks!. Igneous Metamorphic Sedimentary. Igneous Rocks. Igneous rocks are formed from Volcanoes .
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Geography The Story of Rocks! By Bethany Parkinson 9MT
A rock is a compact mass of mineral matter.There are three main type's of rocks! • Igneous • Metamorphic • Sedimentary
Igneous Rocks • Igneous rocks are formed from Volcanoes. • They are formed underground by the trapped, cooled magma. • They are also formed above the ground when the volcanoes erupts and the magma cools.
Examples of igneous rocks: • Examples of igneous rocks are basalt, granite, scona ,pumice and obsidan. Pumice Basalt
Uses for Igneous Rocks: • The most common igneous rocks are granite and basalt. • Granite is used for kitchen worktops and fire surrounds.
Sedimentary Rocks • Sedimentary Rocks are formed under water. • They are made up of layers of bits of eroded earth in lakes. • These layers form into rocks over a period of time.
Types of Sedimentary Rocks: Some examples of sedimentary rocks are shale, Sandstone ,Gypsum, Limestone, Coul and Conglome rale. Limestone Sandstone
Uses for Sedimentary Rocks: • Sedimentary rocks such as sand stone are often used by builders for decoration on window surrounds and windowsills. • Coal is the most common sedimentary rock and is used to burn for heat.
Metamorphic Rocks • Metamorphic rocks are rocks that have been changed by heat and pressure. • Metamorphic rocks were once igneous or sedimentary but have been changed.
Schist and Gnesis are both types of metamorphic rocks. Types of Metamorphic Rocks Gnesis Schist
Uses for Metamorphic Rocks: • Marble which is a metamorphic rock is used for wall and floor tiles. It is also used for fireplaces. • Slate is another metamorphic rock which is used for roofs on buildings. • Metamorphic rocks are tough and resistant.
Weathering • Weathering is when the rocks are broken down by different types of weather. • Freeze thaw weathering is when water gets into the crack of the rocks and it freezes. Repeated freezing and thawing weakens the rock and splits it into pieces. • Weathering is most common in mountainous areas.
Erosion • Erosion is the breakdown of the rocks through their contact with water, ice, heat or anything which rubs against the rocks. • Erosion changes the shapes of the rocks and their texture.
Message from Mr Manson • A simple but very effective design for your work Bethany • I love the way that you have broken each rock type into 3 sections and explained each part individually. • Some really good work and presentation – well done • A1