How does the abundance of phytoplankton change throughout the seasons? Please help..

The oceans cover 70 percent of Earth. Because those waters are too vast for anyone to explore completely and too opaque to see through with cameras, we still have a lot to learn about them. One thing we do know is that the ocean is teeming with floating, drifting life, mostly microscopic.

Explanation:

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heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.