A set of educational posters with information about the three basic types of rock.
使用这个组posterswhen teaching about the three basic types of rocks: igneous rocks, sedimentary rocks, and metamorphic rocks.
Igneous
Igneous rocks are formed when volcanic magma cools and solidifies (from a liquid to a solid).
Examples: basalt, granite, pumice
Sedimentary
随着时间的流逝，沉积岩是由先前存在的岩石的沉积物形成的。
Examples: shale, sandstone, carbonate
Metamorphic
Metamorphic rocks are igneous or sedimentary rocks that are changed over time by extreme heat or pressure.
示例：大理石，石板，石英岩
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