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unti 3 vocab
vocab
Term | Definition |
---|---|
Athenosphere | the upper layer of the earth's mantle |
Subduction | the edge of a plate of the earth's crust going under another plate |
Sea floor spreading | The bottom of a sea or ocean |
Mantle convention | The movement of heat such as magma through the mantle |
Ridge push | A divergent boundary |
Slab pull | The part of the motion of a tectonic plate caused by its subduction |
Lava | Molten rock outside the volcano |
Magma | Molten rock inside the volcano |
Tectonic plate | A plate the moves that causes drifts and creates thing such as mountains and volcanoes |
Theory of continental drift | The one big continent pangea drifted away from each other and gave us the seven continents we live in today |
Convergent boundary | Plates the collide together which can make mountains |
Divergent boundary | Plates that move away from each other that can make a trench |
Transform boundary | Plates that slide past each other which can make a fault |
Hot spot | a small area or region with a relatively hot temperature |
Epicenter | Center of an earthquake |
Focus | A central point or region |
Pangea | One big continent before continental drift |
Geohazard | The state that may lead to widespread damage or risk |
Reverse fault | two blocks of rock are forced together by compression. |
Strike slip fault | Plates that move horizontally |
Normal fault | two blocks of rock are pulled apart by tension |
Compression | When a wave or plate is compacted together |
Tension | when a wave or plate is pulled apart |
Shearing | When a wave or plate slide paste eachother |
Felsic | Light colored rocks |
Mafic | Dark colored rocks |