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Grade 4 Science

Rocks

TermDefinition
igneous rock formed from molten lava
extrusive (lava) igneous rock formed above earth's surface
intrusive (magma) igneous rock formed below earth's surface
less crystallization igneous rock cooled quickly
more crystallization igneous cooled slowly
examples of igneous rock pumice, granite, obsidian
sedimentary rock formed from layers of sediments that settle on top of one another and harden
sedimentary rock new layers press the old layers together
examples of sediment soil, shells, bits of rock, dead plant and animal matter
examples of sedimentary rock conglomerate, limestone, sandstone
metamorphic rock formed from heat and pressure
metamorphic rock chemicals they contain may change their forms or crystal shapes
metamorphic rock can be formed from sedimentary or igneous rocks
examples of metamorphic rock shale, slate, schist
erosion and weathering two processes that can change rocks
weathering process that breaks downs rocks
gravity force that pulls all thing towards Earth
clay a kind of soil
Created by: laroi
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