THE OPEN OCEAN Grade 5 Unit 6. THE OPEN OCEAN How much of the Earth is covered by the ocean? What do we mean by the “open ocean”? How do we describe the.

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Presentation transcript:

THE OPEN OCEAN Grade 5 Unit 6

THE OPEN OCEAN How much of the Earth is covered by the ocean? What do we mean by the “open ocean”? How do we describe the open oceans of Hawai’i?

The World’s Oceans

The ocean is the world’s largest habitat. It covers about 70% of the Earth’s surface.

Scientists divide the ocean into two main zones:

Pelagic Zone: The open ocean that is not near the coast. pelagic zone

Benthic Zone: The ocean bottom. benthic zone

Ocean Zones pelagic zone

Photic zone Additional Pelagic Zones Aphotic zone

Pelagic Zones

The Hawaiian Islands do not have a continental shelf

Inshore: anything within 100 meters of shore Offshore: anything over 500 meters from shore

Inshore Ecosystems

Offshore Ecosystems

Questions 1.) How much of the Earth is covered by the ocean?

Questions 1.) How much of the Earth is covered by the ocean? Answer: 70% of the Earth is covered by ocean water.

Questions 2.) What are the two MAIN zones of the ocean?

Questions 2.) What are the two MAIN zones of the ocean? Answer: Pelagic Zone-the open ocean not near the coast. Benthic Zone-ocean bottom.

Questions 3.) What are some other zones within the Pelagic Zone or Open Ocean?

Questions 3.) What are some other zones within the Pelagic Zone or Open Ocean? Answer: Photic zone- where sunlight penetrates Aphotic zone- where sunlight cannot penetrate Neritic zone- over the continental shelf Oceanic zone- beyond the continental shelf

Questions 4.) What is inshore? What is offshore?

Questions 4.) What is inshore? What is offshore? Answer: Inshore: anything within 100 meters of shore Offshore: anything over 500 meters from shore

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