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How Oceans Shape Life on Earth
How Oceans Shape Life on Earth
25 Jul, 2026
Level: Intermediate
Total vocabularies: 129
Minutes to read: 2
Topic: The Ocean
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More than seventy percent of our planet is covered by ocean.
The ocean is a living system that shapes all life on Earth.
Oceans produce more than half of the oxygen we breathe.
A microscope close-up of glowing green phytoplankton cells suspended in sunlit ocean water, releasing tiny oxygen bubbles
Tiny plants called phytoplankton live near the ocean surface and release oxygen through photosynthesis .
The ocean also controls Earth's temperature by absorbing heat from the sun.
Warm and cold ocean currents move heat around the planet, affecting weather patterns everywhere.
The water cycle depends on the ocean, since most rain comes from water that evaporated from the sea.
An underwater panorama revealing a bustling ocean ecosystem: a massive blue whale gliding above a dense school of silver fish near a sunlit reef
Millions of species live in the ocean, from the smallest bacteria to the largest whale.
These creatures form complex food chains that support life both in and out of the water.
More than one billion people rely on seafood as their main source of protein .
Coastal communities around the world depend on healthy oceans for fishing, tourism, and transportation.
A stark split image showing one side of a thriving turquoise reef versus the other side bleached white and choked with plastic debris
However, human activities such as pollution and overfishing are putting oceans under serious pressure.
Rising ocean temperatures are causing coral reefs to bleach and die.
Understanding the ocean helps us understand life itself.
We must protect our oceans today to preserve life on Earth for future generations.