My+rocks

Rock Families Igneous rock forms from melted rock (lava or magma) when it cools When lava and magma cool, they form two different kinds of Igneous rock: 1. **__Intrusive rock__** – igneous rock that is formed from cooled magma (e.g. granite) 2. **__Extrusive rock__** – igneous rock that is formed from cooled lava (e.g. pumice, basalt, rhyolite)
 * There are three rock families:
 * #1 Igneous
 * #2 Sedimentary
 * #3 Metamorphic
 * **#1 Igneous Rock** – “Born of Fire”
 * __Lava__** – melted rock that is found outside (“on”) the Earth’s crust
 * __Magma__** – melted rock that is found inside the Earth’s crust

__ Sedimentary rock __ Sedimentary rock-(water rocks)-“Nature’s Cement” //__ Sediment __// ary rock-rock that is made from //__sediments__// (little pieces of rocks).Most sedimentary rocks cannot form without water. Sediments-little pieces of rock such as sand, mud, and gravel (and plant and animaI remains-fossils)
 * The main difference between intrusive and extrusive rock is their crystal size, which depends on how quickly they cool.
 * **__Extrusive rock__** (from lava) cools quickly and forms small crystals.
 * **__Intrusive rock__** (from magma) cools very slowly inside the Earth’s crust and forms large crystals
 * __E.g. mudstone (shale), sandstone, limestone, and conglomerate__**