Ocean Science

1. Arctic Ocean

   • Smallest ocean, 15 million sq km (5.8 million sq mi).

   Southern Ocean

   • Encloses Antarctica, approx. 21 million sq km (8.1 million sq mi).

   Indian Ocean

   • Third largest, 70.56 million sq km (27.24 million sq mi).

   Atlantic Ocean

   • Second largest, 85.1 million sq km (32.8 million

After hydrogen and oxygen, what are the two most abundant elements in the oceans?

2. Chlorine and Sodium

   3. The gravitational pull of the moon causes high and low tides.