Igneous rocks
by
CHAsarahj
Last updated 7 years ago
Discipline:
Science Subject:
Chemistry
Grade:
6


2.3 Igneous Rocks
Igneous rocks are classified by their origin, texture, and mineral composition
People throughout history have used igneous rock for tools and building materials
VocabularyExtrusive Rock - igneous rock formed from lava that has erupted onto earth's surfaceIntrusive rock - igneous rock that formed when magma hardened beneath the surface of Earth
Science and the BibleRevelation 8:8 - The angel blew his trumpet, the great mountain, burning with fire, was thrown into the sea, and 1/3 of the sea became bloodPsalms 104:32 - He looks upon the Earth, and it trembles; He touches the mountains, and they smokeDeuteronomy 4:11 - And you came near and stood by the mountain while it blazed with fire to the very heavens, with black clouds and deep darknessGenesis 19:24 - Then the Lord rained down burning sulfur on Sodom and Gomorrah
~ Igneous rocks may form above or below earth's surface ~ Rapidly cooling lava forms fine grained rocks with small crystals or no crystals at all~ Slowly cooling magma forms coarse grained rocks with large crystals.
Andesite - extrusive
Pegmatite - intrusive
Basalt - extrusive
Gabbro - intrusive
Diorite - intrusive
Pumice - extrusive
Rhyolite - extrusive
Scoria - extrusive
Obsidian - extrusive
Granite - intrusive
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