Oceanography

Marine Life Zones

The ocean has distinct life zones based on depth and light: sunlit, twilight, midnight, abyss, and trenches.

Salty Sea Water

Discover Salty Sea Water as a core part of Oceanography. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.

Tides — The Moon's Pull

Tides are caused mostly by the Moon's gravity. Two high tides and two low tides happen each day in most places.

Ocean Acidification

When CO2 dissolves in seawater, it makes the ocean more acidic. This threatens shellfish, corals, and food webs.

Kelp Forests

Discover Kelp Forests as a core part of Oceanography. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.

Where Does Plastic Go in the Ocean?

Discover Plastic And Pollution as a core part of Oceanography. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.

Why the Ocean Moves: Waves and Tides

Discover Waves and Tides as a core part of Oceanography. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.

Waves On The Shore

Discover Waves On The Shore as a core part of Oceanography. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.