Wave - A disturbance that transports energy from one location to another, Ocean wave - Waves generated in the top 200m of the ocean surface by wind, Tsunami wave - Waves that move the entire water column generated by earthquakes, volcanic eruptions, meteor impacts or landslides, Water column - The entire vertical height of water in the ocean from surface to seafloor, Trough - Maximum downward movement of a wave, Crest - Maximum upward movement of a wave, Amplitude - Height of a wave crest from sea surface to top of the crest, Wavelength - Width of a wave from crest to crest, Oscillate - To move back and forward or up and down, Elastic Energy - Energy stored in rocks as they bend/compress/shear/stretch, Kinetic Energy - Energy of moving things eg. waves, Gravitational Potential Energy - Energy stored in objects at a height eg. meteors, rocks at the top of a cliff, ash in a cloud, Displacement - To move something out the way eg. to move the entire water column, Shoaling - Tsunami waves get taller and narrower as they approach the shallow shore, Inundation - When a crest of a tsunami moves inland, Drawback - When a trough of a tsunami pulls water back into the sea, Friction - Force between two touching objects that slows down motion, Continental Shelf - Shallow seabed around the coast around 150m deep that drops away suddenly to 1000m + depth, Underwater Landslide - When sediment falls off the continental shelf onto the seafloor this displaces a lot of water, Pyroclastic Flow - When an ash cloud from a volcanic eruption gets too dense and collapses downwards this can displace a lot of water,

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