Journey Through Earth's Formation and Evolution
Explore the origins of the Earth through the Big Bang Theory, Nebula Theory, Iron Catastrophe, and Formation of the Moon. Learn about Earth's layers, Pangea supercontinent, and the fascinating processes that shaped our planet over billions of years.
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Presentation Transcript
Big Bang Theory Origin of our universe Happened 13.7 billion years ago Everything in the universe was together in the size of a golf ball There was a massive explosion that expanded
Nebula Theory Created the solar system Happened 4.5 billion years ago Most of the matter went into the sun Left a small ring of debris o Gas was pushed out and formed the gassy planets o Rocks stayed close and formed the rocky planets
Iron Catastrophe Over two - thirds of the Earth melted Happened about 500 million years after the Earth was formed Caused by: o Radioactive decay o Meteorite impact Formed oceans of lava Formed the layers of the Earth
Earths Layers Inner Core o Solid o Made up of iron and nickel Outer Core o Liquid o Source of magnetic field Mantle o Solid o 80% of the volume of planet earth Crust o Oceanic crust o Continental crust
Formation of the Moon Moon was formed tens of millions of years after the Iron Catastrophe Mars sized object collided with Earth Collision caused the upper Earth to melt Material blown off the Earth formed the moon Moon is made up of the same material as the mantle (basalt)
Pangea Pangea - all of Earth o Pan - all o Gea - Earth o supercontinent that all continent branched from Proposed by Alfred Wegener in 1915 Wegener noticed that: o The continents fit together o Coastal geology was the same o Fossils matched
