0 mm. When you watch the tide go out and see rocks emerge, the ocean bottom is now at the ocean surface.
surface of the ocean
Surface?
the ocean-bottom
Surface
The sun is not as close to the bottom of the ocean as it is at the top.
The opposite of bottom would be the top, so the oceans surface is the opposite of the ocean floor/bottom.
surface
The antonym is bottom.
yes
The amount of sunlight increases
Submarines can see the surface of the ocean with a periscope when they are close to the surface.
Upwelling is the ocean process that brings vital nutrients from the bottom to the surface waters. It occurs when cold, nutrient-rich waters from the deep ocean rise to the surface, fueling the growth of phytoplankton and supporting a vibrant marine ecosystem.