This ocean feature, the second-largest, slowly widens each year due to shifting tectonic plates.

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Your new ahaThe Atlantic Ocean

The Atlantic Ocean: The second-largest ocean, separating the Americas from Europe and Africa. Source: Atlantic Ocean ↗

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16This ocean feature, the third-largest and warmest of the major oceans, borders Africa, Asia, and Australia.RECALL
The Indian Ocean
The Indian Ocean, the third-largest and warmest of the major oceans, borders Africa, Asia, and Australia.
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17This ocean feature, the smallest and shallowest ocean, stays largely covered by sea ice much of the year.RECALL
The Arctic Ocean
The Arctic Ocean, the smallest and shallowest ocean, stays largely covered by sea ice much of the year.
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18This ocean feature, linked to rising carbon dioxide, threatens marine organisms that build shells.RECALL
Ocean Acidification
Ocean acidification, linked to rising carbon dioxide, threatens marine organisms that build shells.
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