There are three main types of rocks: Igneous, sedimentary and ____. Each of these types of rocks can be turned into each other in a process known as the rock ____. Most rocks on Earth began as an igneous rock which formed from cooled ____. The wind and rain breaks the rock down into smaller pieces called ____. This process is called ____ and erosion. The wind and water carry the sediments into lakes and rives and they sink to the bottom. Over time the rock will be ____ by many more pieces of rock and they stick together to form a new type of rock called ____ rock. When sedimentary rock is buried deep under the Earth's surface, the heat and ____ turn the rock into metamorphic rocks. If metamorphic rock are heated further they may ____ and turn into magma. If this magma is cooled either by being lifted towards the Earth surface or by shooting out of a ____ it will turn back into igneous rock once again.

The Rock Cycle

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