Planet Earth is dynamic with a surface that is always changing. Rocks can be converted into another type of rock, for example igneous to metamorphic. These process are shown in the rock cycle, which describes the ways in which rocks are slowly recycled over millions of years and transformed between the three rock types: sedimentary, igneous and metamorphic rocks.
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Discovering Geology introduces a range of geoscience topics to school-age students and learners of all ages.