zones of the ocean. it’s all just one big ocean!
TRANSCRIPT
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 – landYellow – sunlight zoneOrange – twilight zoneBlue – 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