Zones of the Ocean

It’s all just one big ocean!

Oceans have a structure

Sunlight or surface zone Twilight or transition zone Midnight or deep zone Photic (light) ocean zones Legend: Brown – land Yellow – sunlight zone Orange – twilight zone Blue – midnight zone

INTERTIDAL ZONE

INTERTIDAL ZONE NERITIC ZONE INTERTIDAL ZONE NERITIC ZONE

INTERTIDAL ZONE NERITIC ZONE OCEANIC ZONE

INTERTIDAL ZONE NERITIC ZONE OCEANIC ZONE BENTHIC ZONE

INTERTIDAL ZONE – from high tide line to low tide line Pounding waves Changes in temperature Changes in salinity Underwater & exposed to air Aerial predators Little food

NERITIC ZONE – low tide line to continental slope More life than any other zone Major fishing grounds Sunlight Nutrients from land and benthic zone (floor)

NERITIC ZONE SUNLIGHT & NUTRIENTS: –Allows phytoplankton (plants) to grow –Supports large number of zooplankton (animals) –Plankton is the basis of Ocean Food Webs

OCEANIC ZONE – from continental slope to continental slope Less sunlight & nutrients than Neritic Zone Supports fewer organisms Organisms are very different because of changes in water as depth increases.

BENTHIC ZONE – the ocean floor Deepest parts get no sunlight & is very cold Many organisms get food from material that sinks down from above Some organisms get energy from chemicals (chemosynthesis) that come from Hydrothermal Vents.

Hydrothermal Vents - Geysers on the sea floor Spew out super hot, mineral- rich water. Most are found along mid- ocean ridges. Habitats to bacteria who feed on sulfur and methane – chemosynthesis – the basis of the benthic food web. Organisms who live in these extreme conditions are called extremophiles.

Giant Tubeworms 8 feet long, 4 inches wide No mouth No digestive system Live on hydrothermal vents Live where water is boiling and freezing.

Seeps Type of vent that is lower in temperature than a hydrothermal vent. Release chemicals like methane, hydrogen sulfide, salts Supports diverse life

Ocean zones foldable 2-day project –Day 1: classroom – build your foldable; explore the classroom resources and write some notes; decorate your front page. –Day 2: computer lab – create a login to TED Ed lessons, view the Deep Ocean Mysteries and Wonders lesson, and complete your foldable. The Dig Deeper tab lists links on which you will explore several kinds of aquatic organisms that need to be added to your foldable.

Ocean zones foldable 4 Foldable tabs: –1. intertidal zone – 2. neritic zone –3. oceanic zone –4. benthic zone Each page has these 4 sections: –1. Location –2. Description of conditions (2-3 sentences) –3. Examples of organisms and their adaptations (2-3 organisms). –4. A drawing of an organism and its name

Ocean zones foldable rubric Creativity (5 pts) –Has color –Shows that student invested time and used it wisely Organization and completion (10 pts) –All sections are present on each page –Pages are well organized and neat Correctness (10 pts) –All information is correct –Information presented shows that a student understands the material Total point possible: 25