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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 |