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  1. SEA

  2. Sea - Wikipedia

  3. Ocean facts! - National Geographic Kids

  4. Sea - National Geographic Society

  5. Explore oceans - BBC Bitesize

  6. Ocean | Definition, Distribution, Map, Formation, & Facts

  7. World's Seas - National Geographic Society

  8. Seawater | Composition, Properties, Distribution, & Facts

  9. Ocean - National Geographic Society

  10. Ocean - Wikipedia