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Science Unit 3

Science Semester 1

QuestionAnswer
Crust Outer layer (Where we live)
Mantle Dense layer of molten rock beneath the crust
Outer Core Hot layer of liquid metal
Inner Core Solid metal ball formed under extreme temperatures & pressure
Alfred Wegener German scientist, introduced the Pangea theory
Pangea (Theory) A time when all of the continents where a single land mass
Why Pangea doesn't exist They separated, Continental drift
3 pieces of evidence proving Pangea Mountain Ranges, Fossils, Climate change
Mountain Ranges Lines up on different continents
Fossils Different fossils matches different on different continents, plants and animals
Climate change Scratches in rocks made from glaciers, Matches different continents, hot continents have rock scratches
Why was Wegener's Theory rejected? He couldn't explain HOW the continents moved/tectonic plates
Hess's evidence supporting Wegener's Theory Magnetic strips, Pillow shaped rocks, rocks age, mid ocean ridge
Magnetic strips (+ & -) Matches on both sides of the mid ocean ridge
Pillow shaped rocks When the magma erupts the magma is hot and the water/ocean is cold, causing it to cool fast
Rock age The newer rock is closer to the mid ocean eruption site and the older rock is farther away
Mid Ocean Ridge Where the tectonic plates meet, where magma erupts
Created by: julesda
 

 



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