LT: I can explain how rocks are changed and created in the rock cycle.

LT: I can explain how rocks are changed and created in the rock cycle.

Sedimentary rock pictures http://javiciencias.blogspot.com/2012/05/external-dynamics-of-earth.html#!/2012/05/external-dynamics-of-earth.html Sedimentary rock pictures

Metamorphic rock lesson http://www.msnucleus.org/membership/html/jh/earth/metamorphic/lesson1/metamorphic1a.html Metamorphic rock lesson

http://www.msnucleus.org/membership/html/jh/earth/igneous/index.html Igneous rock lesson

GROUP 1 Physical Characteristics No layers May have gas holes May have a glassy surface Can have two different colored grains Rarely reacts with acids No fossils Light or dark colored

INSTRUCTIONS Examine the rocks in your box Describe each rock’s physical characteristics on the chart Choose the rocks that match the listed characteristics on the next slide and put them in box #1.

Rock identification key with pictures http://www.exploringthepotteries.org.uk/nof_website1/natural_history_static_exhibitions/identifying_rock_minerals_and_fossils/pages/irmf_rock_key.htm Rock identification key with pictures

IGNEOUS No layers May have gas holes May have a glassy surface Can have two different colored grains Rarely reacts with acids No fossils Light or dark colored

IGNEOUS No layers May have gas holes May have a glassy surface Can have two different colored grains Rarely reacts with acids No fossils Light or dark colored 11 – Granite 12 – Basalt 13 – Basalt 16 – Obsidian 17 – Pumice 19 – Scoria 20 - Tuff

GROUP 2 Physical Characteristics Often has fossils Pieces cemented together Large or small grains Often has layers Reacts with acids Has great color variety

Pieces cemented together Large or small grains Often has layers SEDIMENTARY Often has fossils Pieces cemented together Large or small grains Often has layers Reacts with acids Has great color variety 4 – Limestone 5 – Limestone 6 - Sandstone 7 – Shale 8 - Sandstone 9 – Limestone 10 – Sandstone

May have alternating bands of dark and light minerals METAMORPHIC May have alternating bands of dark and light minerals May be one solid color with a waxy surface Rarely has pores or openings Rarely has fossils Visible crystals May have just one mineral May have curved foliated layers

May have alternating bands of dark and light minerals METAMORPHIC May have alternating bands of dark and light minerals May be one solid color with a waxy surface Rarely has pores or openings Rarely has fossils Visible crystals May have just one mineral May have curved foliated layers 14 – Gneiss 15 – Marble 18 – Quartzite 20 - Slate

A: By looking at their physical characteristics!

HOW ARE ROCKS FORMED?

For a rocking good time click: http://library.thinkquest.org/J002289/igneous.html http://aitc.oregonstate.edu/grown/geology/images.htm