The crust that made of granite. It is 30-50 km thick.
Continental crust
The study of Earth's ocean
Oceanography
An underwater volcanic mountain
Seamount
Flat area underwater with sediment
Abyssal plain
The scientists who study the ocean
Oceanographer
The use of sound wave to find the distance to the bottom
Echolocation
Name 5 world oceans
Pacific, Atlantic, Indian, Southern, Arctic
A deep canyon forming between crusts in V-shape when a section of crust moves under another
Ocean trench
An underwater volcanic mountain with flat top
Guyot
Shallow underwater extension of continent
Continental shelf
New oceanic crust forms at cracks
Mid-ocean ridge
A volcano above the ocean surface
Volcanic island
Steeply slanted area between shelf and ocean floor
Continental slope
The crust that made of basalt. It is 5-10 km thick.
Oceanic crust