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Tetonic Plates

Science Vocab

Continental drift the movement of Earth's continents relative to each other
plate tectonics theory the theory that Earth's crust is made up of individual plates that gradually move in relation to each other
tectonic plate one of several huge pieces of Earth's crust
lithosphere the part of Earth which is composed mostly of rocks; the crust and outer mantle
fault a crack in a body of rock along which rocks on opposite sides slide past each other
seismic wave waves of energy that travel through Earth’s interior due to an earthquake, other tectonic forces, or an explosion
seismograph an instrument used to detect and measure earthquake waves and other ground vibrations
Pangaea the large supercontinent at the end of the Paleozoic Era consisting of all the land on Earth, including all seven continents and other landmasses
seafloor spreading the process by which new oceanic lithosphere forms at mid-ocean ridges as tectonic plates pull away from each other
subduction the sinking of an oceanic plate beneath a plate of lesser density at a convergent boundary
convection the transfer of heat from one place to another caused by movement of molecules
What causes plates to move? convection currents
What are the four types of volcanoes? cinder, cone, shield, and stratovolcano
What is continental theory? The idea that earthś continents moved apart from a singe large continent called Pangaea.
What evidence supports this theory? Fossils of the same species were found on different continents. The continents seem to fit together, or were once joined. Glacial evidence show that the ice flowing from glaciers come from one point.
Why wasn’t accepted at first? Alfred Wegener couldn´t explain how the continents moved.
What are P-waves? seismic waves that travel the fastest.
What is a convergent boundary? two plates moving towards each other. Example: Himalayas
What is a divergent boundary? Two plates moving away from each other. Example: Mid-Atlantic Ridges
What is a transform boundary? Two plates sliding past one another. Example: San Andreas Fault
Do tectonic plates move? Yes, about 5 centimeters per year.
Where is the Ring of Fire? The Pacific Ocean.
Created by: LovelyyBRJ
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