Between the Tides
Upper Intertidal Zone
Middle Intertidal Zone
Lower Intertidal Zone
Soft-bottom Communities
Vocabulary
100

The organisms in the intertidal zone will be exposed during this tide.

What is low tide?

100

Intertidal areas that are most affected by wave action

What are rocky intertidal areas?

100

Coral reefs are often mistaken for _____

What are plants?

100

This is another name for the epipelagic zone.

What is the open ocean?
100

The mesopelagic zone occurs at this depth

What is 200-1000 meters?
100

The most diverse marine ecosystem

What are coral reefs?

200

Estuaries created with glaciers retreated due to global warming.

What are fjords?

200

The biggest problem for sandy intertidal zones

What are anoxic zones?

200

Coral is made up of interconnected _____.

What are polyps?

200

Animals must be able to do this in order to survive here.

What is float
200

The light created by deep ocean animals to attract prey and scare predators.

What is bioluminescence?

200

The ecosystem that is used a nursery

What are estuaries?

300

Animals in estuaries that can regulate their salt levels.

What are osmoregulators?

300

Changing shape and being lighter colors help adapt organisms to what problem in intertidal zones.

What is temperature change?

300

Coral eats by ____.

What is filter feeding?

300

This part of the water column has the highest amount of ________ production.

What is primary?

300

Animals in the deep ocean have to be able to withstand ________.

What is high pressure?

300
Ecosystem with high biomass and low biodiversity

What are estuaries?

400

The only estuary with hard bottom substrate

What are oyster reefs?

400

The intertidal level that contains sea stars

What is the mid level?

400

The process that leads to coral bleaching by increasing the acidity of the ocean is ______.

What is ocean acidification?

400

Animals here have a unique ability to take ____directly from the water around them.

What are nutrients?

400

The main thermocline is located here.

What is the mesopelagic zone?
400

__ are indicators of a healthy ecosystem.

What are predators?

500

Building sea walls combats this climate change problem in estuaries.

What is rising sea levels

500

An adaptation for clams and barnacles in intertidal zones.

What is clamming up?

500

Some coral have a symbiotic relationship with ___ that help them receive extra nutrients.

What are zooxanthellae 

500

Vertical migration occurs through the epipelagic zone and the ________ zone.

What is the mesopelagic zone

500

Animals in the deep ocean must contain pressure-resistant ____ in order to break down their food.

What are enzymes?

500

Adaptations are the changes an organism develops to be _______ to its environment.

What is better suited
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