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Rocks
Term | Definition |
---|---|
crust | the outermost layer of Earth |
erosion | the wearing away and removal of rock |
igneous rock | any rock formed by the cooling of magma or lava |
inner core | the innermost layer of Earth |
lava | hot liquid rock located above the Earth's surface |
magma | hot liquid rock located below the Earth's surface |
mantle | the thickest layer of Earth, between the core and the crust |
metamorphic rock | any rock that has been changed by intense heat and pressure |
outer core | the layer of Earth that lies between the mantle and inner core |
sediment | small rock fragments |
sedimentary rock | any rock formed when sediment is compacted or cemented |
cementation | gluing together of sediments |
compaction | the squeezing together of sediments from the overhead layers |
melting | solid to liquid |
pressure | force applied over a certain area |
the rock cycle | changes that turn one rock type into another |
weathering | the breakdown of rocks into small grains |
cooling | liquid to solid |
the deeper you go into earth... | the more heat and pressure there is |
examples of igneous rocks | granite and obsidian |
examples of sedimentary rocks | limestone and sandstone |
examples of metamorphic rocks | marble and slate |