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Become a nitrogen atom in the nitrogen cycle in our Traveling Nitrogen Classroom Activity Kit/Game. See all our games, activity kits and classroom activities.
Although this seal is almost black in color, some seals are bright white!
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Windows Original, adapted from Corel Photography

Seals

Seals are carnivorous animals that live partly in the ocean and partly on land. Most seals come on land to mate and to shed their hair. But, seals can live up to 90% of their life in the water. So, they have webbed feet for swimming.

Seals eat fish, squid, molluscs and zooplankton. Incredibly, seals can also kill and eat penguins and other seals! Unfortunately for seals, sharks, killer whales and polar bears eat them.

Oil spills can have a direct effect on seal colonies. Toxic chemicals will be taken in by the seals because they have eaten food with toxins in it. These toxins can eventually get into the blood stream making them prone to disease and death. Seals are also often caught in nets! So, humans need to be careful not to disrupt seal populations!


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"Science, Evolution, and Creationism", by the National Academies, provides fascinating background on these topics for all, and is particularly useful for the Earth and space science classroom. Check our other books in our online store.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF