THE ROCK CYCLE BY Lacey Tait. The Rock Cycle CONTINUE QUIZ MOVIE ASSIGNMENT SOURCES.

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Rocks and the Rock Cycle

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Presentation transcript:

THE ROCK CYCLE BY Lacey Tait

The Rock Cycle CONTINUE QUIZ MOVIE ASSIGNMENT SOURCES

INTRODUCTION Today we are going to be like geologist and learn to identify rocks by their different characteristics. NEXT

THE ROCK CYCLE The rock cycle begins with igneous rock, created by magma, flowing to Earth's surface. Weathering alters the rock chemically and breaks it into particles. The particles accumulate and harden to form sedimentary rock. As the sedimentary rock becomes buried, heat and pressure transform it into metamorphic rock. With enough heating, metamorphic rocks melt into magma that can form igneous rock, completing the cycle. NEXTBACK

Characteristics  Igneous  With or without observable crystals  Not in layers  With or without air holes  Could be glass-like  Sedimentary  Rounded-appearing mineral and rock particles that are cemented together  Often in layers  Metamorphic  Crystals/minerals lined up (aligned)  Often in layers, sheet-like BACK Music Video

Bill Nye: “Rocks Rock Harder” BACK

IGNEOUS Once were molten rock, their locations in Earth’s crust controlled the rate at which they cooled. 2 Types  Extrusive rock forms from magma that reaches Earth's surface. The magma emerges as streams of hot lava or as fine cinders and ash. Volcanoes are piles of lava, cinder, and ash that have accumulated over tens, hundreds, or even millions of years.  Intrusive rocks form from magma that does not rise all the way to Earth's surface. Instead, it pushes into older rock formations and hardens into structures called intrusions.

SEDIMENTARY Eroded materials, dissolved mineral, and the remains of living things are moved by water and wind and deposited as sediments. Sedimentary rock is formed when these sediments become solid material. 3 Types 1.Clastic - sediments-are rock fragments that range in size from large boulders and stones, through pebbles and gravel, to grains of sand and particles of silt (fine dirt) and clay. Air, water, and frost create these sediments by weathering rock, breaking it into fragments. 2.Chemical sediments- minerals that dissolve in water. When the water evaporates, the minerals crystallize, leaving deposits of such minerals as rock salt, phosphate rock, and gypsum. 3.Organic sediments- are the shells, skeletons, and other parts of once-living things.

METAMORPHIC Changed by heat and pressure over time, but not enough to melt them. These rocks may have been buried under Earth’s surface or have been near a heat source.  Metamorphic rock forms when a rock's appearance— and, in most cases, its mineral composition— changes. Geologists call this process of change metamorphism.

WHAT TYPE OF ROCK AM I? NEXT

WHAT TYPE OF ROCK AM I? I have layers. BACK NEXT

WHAT TYPE OF ROCK AM I? I have distinct particles. BA CKNEXT

WHAT TYPE OF ROCK AM I? I am light weight and light colored. BACKNEXT

I am a sedimentary rock. NEXT

WHAT TYPE OF ROCK AM I? I am formed from magma. NEXT

WHAT TYPE OF ROCK AM I? When I cool I form crystals. BACKNEXT

WHAT TYPE OF ROCK AM I? I look glassy. BACK NEXT

I am an igneous rock. NEXT

WHAT TYPE OF ROCK AM I? I have thick layers. NEXT

WHAT TYPE OF ROCK AM I? I am tightly compacted. BACK NEXT

WHAT TYPE OF ROCK AM I? I am shiny. BACK NEXT

I am a metamorphic rock.

Homework Assignment  Take pictures of rocks around your home, look at the different characteristics of each rock and decide what type of rocks they are. Record your observations in a journal. Report back to class ready to present your information. EXTRA CREDIT  Watch the movie then answer the 5 true/false questions and turn them in tomorrow. EXTRA CREDIT Additional Info

BACK

Sources Cloos, Mark. "Rock." World Book Student. World Book, Web. 17 June &st=rock+cycle &st=rock+cycle “Minerals and Rocks.” Lesson plans: -Classifying Rocks and Minerals by Teresa Hislop and Jennifer Edwards -Rock Discovery by Utah Lesson Plans Core Standards 4 th Grade Science Standard 3 Students will understand the basic properties of rocks, the processes involved in the formation of soils, and the needs of plants provided by soil. Objective 1 Identify basic properties of minerals and rocks.