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unit 3 vocab, peyton
Term | Definition |
---|---|
Asthenosphere | the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur. |
Subduction | when a tectonic plate slips under another |
Seafloor spreading | the thought that new ocean crust is formed mid ocean ridges and destroyed deep see trenches |
Mantle convection | when the magma in the mantle is doing a movement and the density gets higher and lower as it moves and is one of the main reasons the plates move |
ridge push | when magma pushes up and opens the surface |
slab pull | When a plates goes under another and goes to the mantle |
Lava | melted rock and is above the surface |
magma | melted rock below the surface |
Tectonic plates | plates under us, they move and when they do the cause volcanoes and earthquakes |
theory of continental drift | The theory that all plates were all together in a super continent and then moved apart to what we have now |
convergent boundary | When two plates hit and one goes under another |
divergent boundary | When two plates are moving apart from each other |
transform boundary | When two plates slide against each other |
hot spot | heat, can be a volcano |
epic enter | point on earths surface above focus of earthquake |
focus | point of fault where the earthquake originates |
Pangaea | all continents in one |
Geo hazard | spread of damage to the ecosystem |
reverse fault | it is compressed, a vertical movement, and happens on convergent boundary |
strike slip fault | It comes from sheer stress, it is horizontal movement, and is on transform boundary |
normal fault | it comes from tension, it is a vertical movement, happens on convergent boundary |
compression | When there is many things on top of an object making it small, or more compact together |
tension | When something is pulling against each other |
sheering | sliding against something |
felsic | |
mafic |