Igneous Rocks Eric Angat Teacher

How do I identify an igneous rock? Essential Question How do I identify an igneous rock?

Instructions Answer the clarifying questions individually (20 minutes). When done in answering all 15 questions, your teacher will tell you to group yourselves together and then distribute the bags of igneous rocks. 2. Read and follow the instructions. Talking too much deprives you and others of needed learning so you need to be quiet and focus on the task at hand. You will receive a consequence such as detention or ISS if you do not follow instructions. 3. Observe each rock and record your observations on your activity papers.

http://regentsearth.com/Illustrated%20ESRT/Page%206%20(Igneous)/Mafic-Felsic.htm

Extrusive igneous rock-on the surface Felsic Igneous rock Mafic Igneous rock Small Crystals Extrusive igneous rock-on the surface Intrusive igneous rock- ( pluton) underground Big Crystals

1. What is rock texture? The texture of a rock refers to its grain or mineral crystal size. MIXED FINE AND COARSE Big crystals Small crystals Mica=black Feldspar=brown Quartz=white http://www.indiana.edu/~geol105/images/gaia_chapter_5/igneous_rock_textures.htm Porphyritic texture Coarse texture Fine texture

1. What is rock texture? The texture of a rock refers to its grain or crystal size. Breccia-mixture of large and small grains. Very small crystals Big pores or holes. http://www.indiana.edu/~geol105/images/gaia_chapter_5/igneous_rock_textures.htm http://www.newark.osu.edu/facultystaff/personal/jstjohn/Documents/Common-rocks/Volcanic-breccia.htm Pyroclastic texture Glassy texture Vesicular texture

Breccia-mixture of large and small angular grains. MIXED FINE AND COARSE Breccia-mixture of large and small angular grains. Porphyritic texture Pyroclastic texture

2. How do Igneous rocks form? Extrusive rocks- example is basalt. Intrusive rocks- example is granite.

3. What are the types of Igneous Rocks http://2ref.info/?w=Bing+Images+www.bing.com%3A80%2Fimages%2Fsearch

Cooled lava forms basalt igneous rocks Moai Statues (Easter Island) Basalt, trachyte, and scoria Basalt (extrusive rock) and granite (intrusive rock) are two of the most common igneous rock types on the Earth, and cover most of the igneous deposits on the planet. Usually, the rocks in deep ocean floors are known to be basaltic in nature, while the rocks in the continental mass are granitic in nature. Owing to their interlocked crystals, igneous rocks boast of a strong and stable structure, which, in turn, makes them highly popular in the world of architecture. Each igneous rock variety has uses of its own; some are used for kitchen counters, some for decorative purpose, and some for interior designing and jewelry making. Igneous rocks have been used in architectural construction for several centuries. In fact, some of the most famous monuments in the world have been built using these rocks and therefore, it would be a bit harsh on our part to ignore these monuments when compiling interesting facts about this rock type. Read more at Buzzle: http://www.buzzle.com/articles/igneous-rock-facts.html http://www.buzzle.com/articles/igneous-rock-facts.html Mount Rushmore (USA) Granite Cooled magma form granite igneous rocks

The two types igneous rocks https://www.youtube.com/watch?v=PrN7jygu4cQ http://www.polk.k12.ga.us/olc/page.aspx?id=88785&s=152

4. How do igneous rocks form from subduction? 1.Oceanic lithosphere sinks to the asthenosphere. 3.Lava cools to become extrusive rocks. volcanoes http://en.wikipedia.org/wiki/Convergent_boundary 2.Magma cools to become intrusive rocks. Plate melts to become magma. subduction

To compare relative sizes

5. The parent material for all rocks is A. silica B. quartz C. granite D. magma http://hs-staffserver.stjames.k12.mn.us/~fraken/earth%20science%20files/grade%208%20practice%20quizzes/igneousrockquiz.html

6. Which of the following types of rock is produced by magma that cools deep below the earth's crust? A. extrusive igneous B. intrusive igneous C. foliated metamorphic D. chemical sedimentary http://hs-staffserver.stjames.k12.mn.us/~fraken/earth%20science%20files/grade%208%20practice%20quizzes/igneousrockquiz.html

7.The size and arrangement of crystal grains in igneous rocks is called A. density B. texture C. hardness D. luster http://hs-staffserver.stjames.k12.mn.us/~fraken/earth%20science%20files/grade%208%20practice%20quizzes/igneousrockquiz.html

8.The texture of igneous rock is determined by the rate at which magma A. flows from a volcano B. cools C. melts D. compresses Slow cooling =big crystals Fast cooling=small crystals http://hs-staffserver.stjames.k12.mn.us/~fraken/earth%20science%20files/grade%208%20practice%20quizzes/igneousrockquiz.html

9. An igneous rock with a mixture of large and small grains is A. a porphyry B. an intrusion C. an extrusion D. a breccia http://hs-staffserver.stjames.k12.mn.us/~fraken/earth%20science%20files/grade%208%20practice%20quizzes/igneousrockquiz.html

dark colored and has big crystals. 10. An igneous rock that is dark colored and has big crystals. Felsic, intrusive, fine crystals Mafic, extrusive, coarse grain Mafic, intrusive, coarse grain Felsic, extrusive, fine grain

What is the Rock Cycle? https://www.youtube.com/watch?v=55n_ep952ro http://wallpaper222.com/explore/three-basic-types-of-rocks/ https://www.youtube.com/watch?v=55n_ep952ro