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Earths layers
| Term | Definition |
|---|---|
| Crust | The top of earth layer divided into oceanic crust and continental, least dense and a solid, the tem is really low compared to the other layers |
| Mantle | the middle layer that is solid but can still flow, hotter than the surface and more dense, biggest layer |
| outer core | A liquid mantle layer that is the reason we have a magnetic field, second hottest and densest layer |
| inner core | the center of Earth that is solid metal and the hottest and densest layer, spins 8x faster than Earths axis, as hot as the outside of the sun |
| core | both the outer and inner cores combined |
| lithosphere | The very top of the mantle, this makes up the plate tectonics |
| asthenosphere | the top of that mantle below the lithosphere, plate tectonics float on top of this and is the reason for Earthquakes |
| mesosphere | the rest of the mantle that isn't the lithosphere or asthenosphere, this is where most convention currents take place |
| continental crust | the part of the crust that make up the 7 continents and other islands |
| oceanic crust | the rest of the crust that is under water, this is constantly being replaced at mid ocean ridge and when it meets the land in go back into the mantle |
| mid ocean ride | a chain of volcanoes under the water that make new crust in the ocean |
| plate tectonics | This is the dived crust plates, two types oceanic and continental |
| convention currents | rocks rising and sinking in the asthenosphere as they get hotter and less dense and cool down and get more dense, this causes the plates of the Earth to move. |
| volcano | A mountain with a store of lave under it that can shoot it out, and depending on where it is, it can make a island arc. |
| sea-floor-spreading | The floor of the sea is always moving and being born and dying, we know this because of its evidence (see below) |
| magnetite reversal | Every 8 million years or so the Earth magnetic field switches making magic north different with different rocks born at different times, this is evidence because different rocks on the ocean floor have this and they line up the same on different sides of |
| pillow lave | small clumps of lave that just came out of the mantle and hit the water and cooled down so fast that is still lave in the inside of it. |
| Age of rock | older rock is contently being pushed away from the mid ocean ridge and being replaced by younger rock |
| Subduction | The process of one plate (primarily a ocean plate) going under another plate back into the mantle. |
| Convergent boundary | when two plates (coutaintal mainly) meet and smash into each other causing the rock to go up making mountains, or a reverse fault, also can be when two plates make and one goes under the other |
| Divergent boundary | when two plates move away from each other making a rift valley or new ocean, this is what a mid-ocean ridge is, this is also a normal fault |
| transform boundary | when two plates slide past each other causing an earthquake, and a big change in rock formations, also a slip-slide fault |
| Pangeda | a big super contentnet with all land plates nest to each other. |
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