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Introduces rocks as common materials found everywhere and explains the first major rock type: igneous rock. It describes how magma or lava cools to form intrusive and extrusive igneous rocks.
please rocks are everywhere they are large and small heavy or light porous or dense but rocks in some shape or form can be found all over the planet different types of rocks are formed in different ways there arethree main types of rock ous sedimentary and metamorphic Ignus is a word that means fiery ous rock is formed when magma or lava cools sometimes magma cools slowly underneath the Earth surface this forms intrusive ous rock like Graniteother times lava cools when it comes to the surface in a volcanic eruption this forms extrusive ous rock some examples of extrusive ous rock are tough obsidian and pmus ous rocks make up about 95% of the Earth's crust
Explains how sedimentary rocks form from layers of deposited material over time. It also notes that fossils are often preserved in sedimentary rock and gives common examples.
the next type of rock is sedimentary rock sediment is small particles of sand mud and organic material that settle to the bottom of water or land areas often lakes or oceans sedimentary rocks are formed when sediment accumulates overtime in deposits that form layers these layers become squeezed and compressed over time until they consolidate into a rock sedimentary rocks are the types of rocks in which fossils may be found since the process of forming sedimentary rockscan preserve plant and animal remains that are deposited into the sediment layers some examples of sedimentary rock are limestone Shale and Sandstone the third type of rock is metamorphic rock the word metamorph means to change form and metamorphic
Describes metamorphic rock as rock altered by heat and pressure. It explains where metamorphism happens and gives examples of rocks changing into slate, quartzite, and marble.
rock is rock that has been changed by extreme heat and pressure sedimentary rock ous rock or even other metamorphic rocks can be changed by heat and pressure into new kinds of rock metamorphic rocks can be formed by beingdeep under the Earth where pressure and temperatures are high or when rock near the surface is heated up by the movement of tectonic plates or magma different types of rocks become different types of metamorphic rock when exposed toheat and pressure for example shale becomes slate Sandstone becomes quartzite and Limestone becomes marble