Rock and Minerals
Published on Nov 19, 2015
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PRESENTATION OUTLINE
MINERALS & ROCKS
MINERALS ARE FOUND IN NATURE. THEY HAVE NEVER BEEN ALIVE.
YOU USE MINERALS EVERY DAY: salt, graphite pencils, gold coins, and diamonds.
MINERALS THAT YOU USE EVERYDAY ARE GOLD COINS, SALT, DIAMONDS, PENCIL LEAD.
THIS IS A MINERAL.
ROCKS ARE MADE OF MINERALS.
THERE ARE 3 KINDS OF ROCK:
IGNEOUS ^ , SEDIMENTARY V, METAMORPHIC ^
IGNEOUS ROCK CAME FROM VOLCANOES. HOT MELTED MAGMA COOLED AND HARDENED.
THE HOT MOLTEN MAGMA FORMED INTO ROCKS WHEN IT COOLED.
DIRT GETS ERODED. NEW LAYERS ARE STACKED ON TOP. IT IS PRESSED DOWN. NEW ROCKS ARE FORMED.
THIS IS SEDIMENTARY ROCK.
CAN YOU SEE THE LAYERS OF COLOR IN THIS SEDIMENTARY ROCK?
This play dough is like sedimentary rock.
BECAUSE IT HAS DIFFERENT LAYERS.
FIND THE LAYERS OF COLOR IN THIS SEDIMENTARY ROCK.
METAMORPHIC ROCK IS ROCK THAT HAS CHANGED BY HEAT AND PRESSURE.
This play dough is like a metamorphic rock.
EROSION
Wind and water break rocks into smaller bits. This is called erosion.
EROSION is caused by WATER FALLS.
WATERFALLS WEAR DOWN THE MOUNTAINS AND WASH AWAY THE SOIL.
SANDBARS MADE BY WATER EROSION.
EROSION IS CAUSED BY GLACIERS.
THIS GLACIER IS PUSHING THE DIRT.
Glaciers slowly grind mountain walls and valleys.
THE WIND CAUSES EROSION. IT BLOWS AWAY THE SOIL.
THIS ROCK HAS BEEN ERODED BY WIND OR WATER.
EROSION CAUSED BY WATER.
Water erosion created the Grand Canyon.
THE WATER ERODED THE LAND & SEPARATED THE BOLDER FROM THE COAST.
WAVES ERODE THE ROCKS. THEY BREAK APART AND BECOME SAND.
WEATHERING
This sidewalk cracked because of weathering.
WATER SEEPS INTO CRACKS, FREEZES AND BREAKS THE ROCK APART.
WEATHERING: THE ROCK SPLIT BECAUSE FROM FREEZING WATER. THE ICE IN THE CRACKS BROKE IT.
PLANT ROOTS CAN CAUSE WEATHERING. ROOTS BREAK ROCKS.
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FOSSILS ARE THE LEFT OVERS OR REMAINS OF A LIVING THING THAT DIED A LONG TIME AGO.
FOSSILS CAN BE: BONES, TEETH, AND FOOTPRINTS.
FOSSILS HAPPEN OVER LONG PERIODS OF TIME.
Amber fossils are formed when insects become trapped in tree sap which then turn hard.
This is a body fossil.
