1. Introduce ocean habitats.
Go to the NOAA/National Weather Service’s Profile of the Ocean diagram. Discuss the significance of the depths shown on this diagram. Point out to students that the deepest part of the ocean shown is 11,000 meters (36,100 feet), or approximately 11 kilometers (7 miles) deep. Point out the intertidal zone—in the epipelagic zone right above the continental shelf—and tell students it is the region along the shoreline covered by the sea at high tide but exposed to air at low tide. Then point out to students that the top three zones together are called the pelagic zone, or open ocean. Explain that the abyssopelagic, or abyssal benthic, zone is the region that includes the ocean floor. Ask: Why is the ocean divided into different zones? Elicit from students that each zone has unique characteristics and animal and plant life.
2. Have students predict the different conditions that exist in each habitat.
Ask students to describe the differences in pressure, temperature, and light in the different layers of the ocean. Ask:
- Where is it the darkest?
- Where is it the coldest?
- Where is the pressure the greatest?
- Why is that so?
Students should realize that it gets colder and darker and pressure increases as one moves from the surface to the bottom of the ocean.
3. Have students research the animals of each zone and their adaptations.
Distribute the worksheet and have students work in small groups to complete it. Encourage groups to use information from the diagram and the provided Internet resources, or classroom and library resources. Ask students to take turns reading the Internet web pages and leading the discussion in their small groups.
Rotate around the small groups to make sure all students are contributing to the discussions. After students have completed the worksheets, collect the worksheets and use the provided answer key to check students’ answers.
Subjects & Disciplines
- Biological and life sciences
- describe three broad ocean habitats and their locations
- describe the conditions that exist within these habitats
- identify the animals and adaptations in each habitat
- Visual instruction
What You’ll Need
Materials You Provide
The resources are also available at the top of the page.
- Internet Access: Required
- Tech Setup: 1 computer per classroom, Projector
- Small-group instruction
The ocean has three broad habitats: the intertidal zone, the pelagic zone, and the abyss. Water depth, temperature, and the presence or absence of light are some of the conditions that differ in these habitats. Animals adapt to their environments to help them survive. Ocean animals have unique adaptations depending on what ocean habitat they live in.
Recommended Prior Activities
Term Part of Speech Definition Encyclopedic Entry abyss Noun
deep pit in the ocean or other body of water.
environment where an organism lives throughout the year or for shorter periods of time.
Encyclopedic Entry: habitat intertidal zone Noun
region between the high and low tide of an area.
For Further Exploration