Rocks & The Rock Cycle.

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Presentation transcript:

Rocks & The Rock Cycle

Rocks vs Minerals MINERALS ROCKS NATURALLY FORMED OF ELEMENTS OR COMPOUNDS INORGANIC SOLID HAVE CRYSTALS NOT MADE OF ROCKS HAS A DEFINITE CHEMICAL MAKEUP ROCKS SOLID MIXTURE OF MINERALS MAY BE ORGANIC

Rocks vs Minerals MINERALS ARE CLASSIFIED BY CHEMICAL COMPOSITION

Rocks vs Minerals ROCKS ARE -CLASSIFIED BY HOW THEY ARE FORMED EACH TYPE OF ROCK IDENTIFIED BY -COMPOSITION= what minerals the rock is made of. -TEXTURE=sizes, shapes and positions of grains in the rocks

TYPES OF ROCKS THE COMPOSITION OF ROCKS IS DETERMINED -BY THE KIND OF MINERALS & -THE AMOUNT MINERALS THAT MAKE IT UP

TYPES OF ROCKS 3 TYPES OF ROCKS IGNEOUS SEDIMENTARY METAMORPHIC

FORMED WHEN MAGMA or LAVA COOLS AND HARDENS (SOLIDIFIES) 2 TYPES INTRUSIVE MAGMA COOLS SLOWLY BENEATH EARTH’S SURFACE LARGER CRYSTALS COARSE GRAINED (TEXTURE) -EXTRUSIVE LAVA COOLS QUICKLY ON THE SURFACE SMALLER CRYSTALS FINE GRAINED (TEXTURE)

ALL TYPES OF ROCKS CAN BE CHANGED INTO IGNEOUS ROCK BY MELTING & COOLING OF ANY ROCK

KEY WORDS MELTING and COOLING

FORMED WHEN ROCKS ARE WEATHERED AND ERODED, SEDIMENTS COMPACT AND CEMENT SOLID ROCK 3 TYPES ORGANIC FOSSILIZED REMAINS OF PLANTS OR ANIMALS CLASTIC FRAGMENTS OF OTHER ROCK ARE COMPACTED TOGETHER CHEMICAL SEDIMENTS ARE “GLUED” TOGETHER BY DISSOLVED MINERALS -TEXTURE IS DETERMINED BY THE SIZE OF PARTICLES OF SEDIMENT

ALL TYPES OF ROCKS CAN BE CHANGED INTO SEDIMENTARY ROCK BY -WEATHERING, EROSION, & SEDIMENTS COMPACTING & CEMENTING TOGETHER

KEY WORDS Sedimentary Rocks WEATHERING and EROSION COMPACTING and CEMENTING

FORMED WHEN EXISTING ROCK IS CHANGED INTO NEW ROCK BY THE HEATING OF THE ROCK AND PRESSURE FROM OTHER ROCKS AROUND IT. 2 TYPES FOLIATED CRYSTALS ALIGNED IN LAYERS NON-FOLIATED CRYSTALS ARRANGED IN RANDOM MANNER

ALL TYPES OF ROCKS CAN BE CHANGED INTO METAMORPHIC ROCK BY HEAT AND PRESSURE

KEY WORDS HEAT and PRESSURE

Rock Cycle Animations You choose the path Rocks forming

THE ROCK CYCLE One of the cycles of nature that continually recycles rocks & materials that make up Earth’s crust limestone marble siltstone shale gneiss slate

ROCK CYCLE There are many different paths a rock may follow to go through the process of changing from one type of rock to another

THE ROCK CYCLE Gneiss Schist (m) Phyllite (m) (m) Slate Siltstone Shale (s)

THE ROCK CYCLE Granite (i) Sandstone (s) Quartzite (m)

The color of rocks may be different because of the minerals or other substances that make it up. Breccia Sedimentary Gneiss Metamorphic Quartzite Metamorphic Granite Igneous

The ROCK CYCLE Rock Cycle Diagram

Rock Key Metamorphic rocks Igneous rocks Basalt Granite Obsidian Rhyolite Pumice Metamorphic rocks Gneiss Marble Quartzite Schist Slate phyllite Sedimentary rocks breccia conglomerate limestone sandstone siltstone shale