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How Do Natural Forces Change & Shape Our Planet?
LAYERS OF OUR PLANET PHYSICAL LAYERS LITHOSPHERE (SOLID) ASTHENOSPHERE (LIQUID) MESOSPHERE (SOLID) OUTER CORE (LIQUID) INNER CORE (SOLID) CHEMICAL LAYERS CRUST (Si + O) MANTLE (Si) CORE (Fe +Ni)
WHAT IS CONTINENTAL DRIFT? ALL LANDMASSES WERE ONCE ONE LARGE SUPERCONTINENT CALLED PANGEA HYPOTHESIZED BY ALFRED WEGENER IN 1915
PROOF OF CONTINENTAL DRIFT CONTINENTS FIT LIKE PUZZLE PIECES ROCK EVIDENCE FOSSIL EVIDENCE CLIMATIC EVIDENCE
WAS WEGENERS HYPOTHESIS ACCEPTED? HOW DO THE CONTINENTS MOVE? WEGENER PROPOSED THE EARTHS ROTATION HOW COME THE OCEAN BASINS ARENT WORN DOWN BUT THE CONTINENTS ARE?
HOW PLATE TECTONICS TIES IT ALL TOGETHERPLATE TECTONICS
WHERE CAN WE FIND EARTHQUAKES & VOLCANOS?
WHAT IS THE ROCK CYCLE?
WHAT ARE MINERALS? All minerals are solids All minerals are inorganic All minerals are naturally made All minerals have crystalline structures All minerals have a definite chemical composition
WHAT IS WEATHERING? Physical: breaking down of rock (rock stays same) Temperature Ice Plants & animals Water Chemical: breaking down of rock (rock changes) Oxidation Plants Carbonation Acids Water
WHAT IS EROSION? Picking up of rock and moving WATER WIND ICE/GLACIERS GRAVITY
WHAT IS DEPOSITION? Depositing of rocks
How is Soil Created? Soil production involves a dynamic interaction among mineral particles, detritus and members of the detritus food web
Soil Texture Refers to the relative proportions of sand, silt and clay. Particle size and density determine properties such as porosity (how much water soil can hold) and permeability (how fast water travels through the soil).
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