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Rock!

Rocks. Rock!. If you think rocks are boring. Think Again!. Rocks are all around us!. Have you ever wondered where rocks come from?. Did you know the Earth is a giant rock?. All Rocks are Made of Minerals. Minerals are nonliving, solid substances

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Rock!

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  1. Rocks Rock!

  2. If you think rocks are boring...

  3. Think Again!

  4. Rocks are all around us! Have you ever wondered where rocks come from? Did you know the Earth is a giant rock?

  5. All Rocks are Made of Minerals • Minerals are nonliving, solid substances • They occur naturally - they are not made by people • Minerals have different shapes, colors, weights, and degrees of hardness • Minerals come together to form rocks

  6. Types of Rocks • There are three types of rocks: • Each type of rock is formed in a different way Igneous (IG-nee-us) Sedimentary (sed-uh-MEN-tuh-ree) Metamorphic (meta-MOR-fick)

  7. IGNEOUS ROCKS • Igneous rocks form when molten material cools and hardens. • If the molten material is inside the earth, it is called magma. • If the molten material is on the earth’s surface, it is called lava. • The molten material crystallizes into different minerals. • The properties and sizes of the various crystals depend on the magma’s composition and rate of cooling.

  8. IGNEOUS ROCKS • Magma pushes up toward the surface. • A volcano forms on the surface. • Lava flows out of the volcano and cools quickly, forming igneous rocks. • Underground magma pools form, the magma cools slowly, forming crystallized igneous rocks.

  9. Examples of Igneous Rocks… Obsidian Pumice Granite Basalt

  10. The beauty of Pumice

  11. SEDIMENTARY ROCKS • Sedimentary rocks are made of sediments • Sediments come from eroded igneous, metamorphic, and other sedimentary rocks, and the remains of dead plants and animals. • These sediments are deposited in layers and are then squeezed and compressed into rock. • Most fossils are found in sedimentary rocks.

  12. SEDIMENTARY ROCKS • Over time, eroded sediments deposited at the base of a river. • Under great pressure, the sediments are pressed or squeezed to form sedimentary rocks.

  13. Examples of Sedimentary Rocks… Shale Conglomerate Limestone Sandstone Sandstone

  14. Sedimentary Samples

  15. METAMORPHIC ROCKS • Metamorphic rocks form when sedimentary, igneous, or other metamorphic rocks are transformed by great heat and/or pressure. • The word “metamorphic” come from the Greek language and means “to change form”.

  16. METAMORPHIC ROCKS • Sediments sink and add pressure on lower rocks. • Heat and pressure beneath the surface change the mineral make-up older rocks, forming new metamorphic rocks.

  17. Examples of Metamorphic Rocks… Marble Gneiss Schist Metamorphic Mts.

  18. Metamorphic Rock: Before and After

  19. Resources: Rock cycle graphic: Earth Science: Part 2, (2002). The rock cycle.http://www.beyondbooks.com/ear82/7.asp Rock formation animations: Rocky the Rock Hound.http://www.fi.edu/fellows/fellow1/oct98/ Gravel background:sprott.physics.wisc.edu/ fractals.htm Sedimentary, igneous, and metamorphic fill photos:http://wrgis.wr.usgs.gov/docs/usgsnps/rxmin/rock.html

  20. Title of Lesson: Rocks Rock! • Content Area: Science • Grade Level: Third Grade • Subject: Rocks and Minerals • Objectives: • The student will be able to tell that all rocks are made of minerals. • The student will be able to name the three types of rocks. • The student will be able to describe the three ways that rocks are formed. • The student will be able to explain the rock cycle.

  21. Purpose of Presentation • To activate and build the students’ schema and background knowledge on rocks. • To explain the three types of rocks in more detail than the textbook. • To increase student interest in the topic of rocks. • To accommodate visual and auditory learners.

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