Warm-Up:
5 EOG Questions
Ocean Zones
Photic vs. Aphotic Zones
Photic Zone - The top layer
of the ocean where the
sunlight penetrates.
(Plankton)
3
Aphotic Zone – lowest
layer of the ocean where
sunlight does NOT reach
Intertidal Zone – The area that lies between low tide and high
tide.
• Life has to adapt to:
– Tidal changes
(Exposure to air and
covered with water)
– Sunlight
– Low water depth
– Wave erosion
4
Neritic Zone
5
Neritic Zone- Extends from the low tide lint to the edge of the
continental shelf
• Moderate temperature
and pressure
• Animals – (Nekton)
corals, sea turtles,
sponges, colorful fishes,
dolphins, plankton
• Life has to adapt to:
– Sunlight
– Depth (>200M)
– Larger sea life
– Warm water
6
Oceanic Zone
7
Oceanic zone- Extends from the edge of the continent outward to where
the bottom sharply drops off into a steep slope.
• Water depths are <
200 meters.
• Animals – many
types of fish, sharks,
squid… animals vary
with depth
• Life has to adapt to:
8
– Vast spaces
– Low food supply
– Temperature change with
depth
– Light change with depth
9
Benthic Zone
10
Benthic zone – The Ocean Floor; including the floor of the Neritic Zone.
• Animals – (Benthos)
flatfish,
• Life has to adapt to:
– No sunlight
– Food from thermal
vents or scavenging
– Low food supply
– Extremely cold OR
extremely hot
temperatures
11
12
What happens as you go deeper in the ocean to…
• Pressure
– increases
• Temperature
– decrease
• Light
– Gets darker
• Salinity
– Decreases then increases
• Dissolved gasses
– Depends on gas
– in general, colder temperatures hold more dissolved gases
Put your species in the zone it lives in and label the features of
the zone. (slide 3)
Stop Day 2
• Slide 3 – Habitat, labeled with organisms in it
• Slide 4 – Biotic and abiotic features
• Slide 5 – Zone details