Intertidal Zones

​Factors affecting ocean life

Coastal Zones

​Coastal Zones

​Oceanic Zone

​Oceanic Zone

​Oceanic Zone

​Oceanic Zone

​Oceanic Zone

Multiple Choice

Which ocean zone allows plants to grow??

• midnight zone

• photic zone

• twilight zone

• intertidal zone

Multiple Choice

the area between the high tide and the low tide mark

• benthic zone
• intertidal zone
• pelagic zone
• abyssal zone

Multiple Choice

the water area between the low tide mark and the edge of the continental shelf

• nautical zone
• benthic zone
• nueston zone
• neritic zone

Multiple Choice

the open water area beyond the continental shelf

• oceanic zone
• tidal zone
• bahyal zone
• abyssal zone

Multiple Choice

The aphotic zone is

• the ocean's dark lower layer where photosynthesis cannot occur
• the sunlit upper layer of the ocean where photosynthesis occurs
• on the bottom of lakes, streams, and oceans.
• where benthos are found

Multiple Choice

What Zone is 4,000-6,000 meters below sea level?

• Sunlight

• Midnight

• Abyssal

Multiple Choice

The Sunlight Zone is also known as the ____ Zone.

• Epipelagic

• Hadalpelagic

• Mesopelagic

Lifestyles of Marine Organisms

Lifestyles of Marine Organisms

Lifestyles of Marine Organisms

Lifestyles of Marine Organisms

Lifestyles of Marine Organisms

Multiple Choice

organisms that live on or in the bottom of the continental shelf

• benthos

• neuston

• littoral

• heterotrophs

Multiple Choice

Which lives at the top of the ocean, or as far down as the sun can penetrate?

• Nekton

• Plankton

• Benthos

Multiple Choice

Where do nektons live in the ocean?

• Bottom

• Top

• in the neritic zone

• Neither

Multiple Choice

How do benthos move in the ocean?

• They drift freely in the currents.

• They walk along the ocean floor.

• They swim against currents.

• They don't move, they only stay in one spot.

Multiple Choice

Phytoplankton are abundant in this ecosystem, because they are buoyant and float in the upper part of the water.

• Intertidal zone (high tide)

• Ocean (aphotic zone)

• Ocean (photic zone)

• Intertidal zone (low tide)

Multiple Choice

This fish pictured is an example of:

• Sessile life
• Benthic life
• Pelagic life
• Aphotic life

Multiple Choice

This fish pictured is an example of:

• Sessile life
• Benthic life
• Pelagic life
• Aphotic life

SANDY BEACHES

Seasonal Changes

Seasonal Changes

Zonation of Sandy Beaches

Supratidal Zone

Intertidal Zone

Subtidal Zone

ROCKY SHORES

ROCKY SHORES

ROCKY SHORES

Rocky Littoral

Supralittoral Zone

Supralittoral Zone

Midlittoral Zone
"true" Intertidal zone (high and low)

Midlittoral Zone
"true" Intertidal zone (high and low)

Midlittoral Zone
"true" Intertidal zone (high and low)

Sublittoral Zone

Sublittoral Zone

Multiple Choice

Species living in the Intertidal Zone must be able to survive which changes?

• Moisture

• Temperature

• Salinity

• All of the above

Multiple Choice

Competition for which resource is a dominant factor in the rocky intertidal zone?

• food

• light

• oxygen

• space

Multiple Choice

Besides fluctuations in salinity and water levels, intertidal organisms must also withstand wide variations in:

• Temperature.

• Light level.

• Sediment deposition.

• Current velocity.

Multiple Choice

Species living in the Intertidal Zone must be able to survive which changes?

• Moisture

• Temperature

• Salinity

• All of the above

Multiple Choice

What are the 2 Intertidal areas?

• rocky shore and sandy shore

• rocky shore and island shore

• sandy shore and marsh

• marsh and mangrove park area

Multiple Choice

Which of the following organisms are found abundantly on a rocky shoreline?

• Sea Urchins

• Mussels

• Sea stars

• All answers

Multiple Choice

Intertidal Zone that is above the high tide mark. Is only covered by the highest spring tides, and experiences extreme temperature variations.

• Splash Zone

• Upper Shore

• Middle Shore

• Lower Shore

Multiple Choice

Intertidal Zone that has the lowest diversity (periwinkles, limpets,, lichens)

• Splash Zone

• Upper Shore

• Middle Shore

• Lower Shore

Multiple Select

Adaptations that help intertidal organisms withstand mechanical wave stress include (select all that apply)

• attach to the rock with a holdfast

• Low profile shells

• shells with ridges and light coloration

• finding shelter in crevices

Multiple Select

Characteristics of sandy shores include (select all that apply)

• Stable

• porous substrate

• can become completely dry during low tide

• high biodiversity

• organisms tend to burrow in the substrate