Page: 135, 1. The 3 major rock types are : __ __ __. Igneous, sedimentary, metamorphic Page: 135, 2. What is the name of the sedimentary rock shown on this page? sandstone Page: 135, 3. The word igneous is from a Latin term that means “ ___________ ___________” from fire or fire formed

Page: 141, 1. Magma that cools deep inside the Earth’s crust forms ______________ igneous rocks. intrusive Page: 141, 2. The size of the crystals in igneous rocks is determined mainly by the ____________ rate of magma. cooling Page: 141, 3. The rock granite has what type of texture? Coarse-grain texture

Classify igneous mineral content by color Define coarse, fine, glassy, porous textures Understand that color to following igneous

groups: Granitic, Andesitic, Balsaltic

Warm-ups Notes.discussion Complete 4.2 worksheet b reading Glencoe

text Start igneous rocks 1-4 H.W.

MINERAL COMPOSITION OF IGNEOUS ROCKS

Granitic – igneous rock light in color white

to clear, tan, & pink crystals mostly: quartz and feldspar

Basaltic – igneous rock that is dark in color black, dark red-brown crystals

Mostly plagioclase, olivine

Andesitic – mineral colors between granitic and basaltic.

Classifying Igneous Rocks Textures

Coarse Grain – means rock has large crystals that can be seen easily by the naked eye.

(intrusive : magma)

Fine grain – small crystals, just barely able to see with eye, slightly smaller than sand grains. (extrusive : lava)

Glassy – no crystals at all, cooled too fast for crystals to form

(extrusive : lava)

Porous – no crystals, rock full of holes produced by gas bubbles

(extrusive – lava full of explosive gases)

https://www.youtube.com/watch?v=aCnAF1Opt8M

1. What does a coarse-grain igneous rock mean? Large particles or large crystals 2. If lava cools very-very fast what occurs? Glass forms or tiny crystals occur