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Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
Introduce the zones
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Introduce the zones

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  • 1. The World’s Oceans And who lives there…
  • 2. The Ocean <ul><li>Divided into three zones: </li></ul><ul><li>Sunlight </li></ul><ul><li>Twilight </li></ul><ul><li>Midnight </li></ul><ul><li>Can you guess which one is the darkest? </li></ul>
  • 3. The Sunlight Zone
  • 4. SUNLIGHT ZONE <ul><li>Top layer, nearest the surface </li></ul><ul><li>Also called euphotic zone </li></ul><ul><li>Enough light penetrating the water for photosynthesis </li></ul><ul><li>More than 90% of all marine life </li></ul><ul><li>lives here </li></ul>
  • 5. SUNLIGHT ZONE <ul><li>Goes down about 600 ft. </li></ul><ul><li>Most fish live in this zone </li></ul><ul><ul><li>(Stingrays, seals, jellyfish, turtles) </li></ul></ul><ul><li>Plankton live here. </li></ul><ul><ul><li>Plankton are drifters…they can’t swim. </li></ul></ul><ul><ul><li>Usually microscopic </li></ul></ul><ul><ul><li>Beginning of the food chain  </li></ul></ul>
  • 6. PLANKTON <ul><li>Examples are: </li></ul><ul><li>Jellyfish </li></ul><ul><li>Young crabs </li></ul><ul><li>Microscopic plants </li></ul><ul><li>Microscopic animals </li></ul>
  • 7. The Twilight Zone
  • 8. TWILIGHT ZONE <ul><li>Small amount of light can penetrate water </li></ul><ul><li>No plants </li></ul><ul><li>Only those that have adapted </li></ul><ul><li>to little light  </li></ul><ul><li>Also known as disphotic zone. </li></ul>
  • 9. TWILIGHT ZONE <ul><li>Between 600 – 3,000 feet below the surface </li></ul><ul><li>Some squid and fish can use their bodies to make light </li></ul><ul><li>Bioluminescence </li></ul>
  • 10. TWILIGHT ZONE <ul><li>Some twilight zone dwellers </li></ul><ul><li>(like lantern fish) </li></ul><ul><li>will swim into the sunlight zone </li></ul><ul><li>at night to find food . </li></ul>
  • 11. The Midnight Zone
  • 12. MIDNIGHT ZONE <ul><li>90% of the ocean </li></ul><ul><li>Entirely dark—no light </li></ul><ul><li>Temperature is near freezing </li></ul><ul><li>Also called aphotic zone </li></ul>
  • 13. MIDNIGHT ZONE <ul><li>What lives here? </li></ul><ul><li>Some are close to cracks in the Earth&apos;s crust </li></ul><ul><li>Cracks give off mineral-rich materials </li></ul><ul><li>Bacteria uses minerals from the cracks for energy </li></ul><ul><li>All other living things in the </li></ul><ul><li>midnight zone are nourished </li></ul><ul><li>by these bacteria . </li></ul>
  • 14. Let’s Tour The Deep <ul><li>Dive ! </li></ul>

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