Oceans, and other bodies of water, are found on which layer of Earth? Outer core
Mantle
Inner core
Crust

they are found on the crust

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

all eukaryotic cell have mitochondria : )