4 - The ocean made Earth habitable.



A - Most of the oxygen in the atmosphere originally came from the activities of photosynthetic organisms in the ocean. This accumulation of oxygen in Earth’s atmosphere was necessary for life to develop and be sustained on land.

Source: https://education.ocean.org/oc...

B - The first life is thought to have started in the ocean. The earliest evidence of life is found in the ocean.

C - The ocean provided and continues to provide water, oxygen and nutrients, and moderates the climate needed for life to exist on Earth.

Source: https://en.wikipedia.org/wiki/...

Source: http://oceanliteracy.wp2.coexp... 


    Sample Activities of Ocean Literacy Principle #4

    The Great Plankton Race

    Introduction to Ocean Zones

    Learning Objectives

    Continue to 5 - The ocean supports a great diversity of life and ecosystems. »