Fjord Estuary Example

About this printable Fjord Estuary Example science reading passage, NGSS-aligned (Grades 3-6)

This audio -aligned reading passage introduces students to fjord estuaries, deep narrow valleys carved by glaciers and later flooded by seawater. The passage highlights Sognefjord in Norway, one of the world’s largest fjord estuaries, and fjords in Alaska such as Kenai Fjords. Students learn about key characteristics, including their great depth, steep sides, and glacial sills that affect water circulation. It explains why oxygen levels are low in deep waters but why upper waters are rich in life, supporting whales, seabirds, and fish. The passage also explores human uses such as fishing, safe harbors, and tourism, while noting environmental challenges from pollution and climate change. With engaging fun facts and audio integration for accessibility, this passage connects NGSS Life Science: Structure and Function to real-world glacial estuaries.

Written by Workybooks TeamPublished by Workybooks

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Sample passage and quiz from Fjord Estuary Example

Fjord Estuary Example

A fjord is a long, deep, narrow body of water that stretches far inland. Fjords are special kinds of estuaries found in places like Norway. These amazing landforms were created thousands of years ago during the ice age.

Back then, giant sheets of ice called glaciers covered much of the Earth. A glacier is a huge, slow-moving river of ice. As glaciers moved, their heavy ice scraped the land like a giant bulldozer. This powerful scraping carved out deep, U-shaped valleys in the land. These valleys are much deeper and steeper than regular river valleys, which are usually V-shaped.

When the ice age ended, the glaciers melted. The ocean rushed in and filled the deep valleys with salt water, creating fjords. Norway has some of the most famous fjords in the world, with tall, steep cliffs rising from deep blue water. Some fjords are over 4,000 feet deep—deeper than many lakes!

Fjords are home to many animals. Seals rest on rocks or swim in the cold water. Whales come to fjords to eat fish. Salmon swim up fjords from the sea to lay their eggs. Seabirds nest on the high cliffs, safe from most predators.

Fjords are not only found in Norway. You can also find them in Alaska, New Zealand, and Chile. They all share the same shape and history—carved by glaciers, filled by the ocean, and now home to amazing wildlife.

Think of a glacier as a giant ice cube slowly sliding down a mountain. As it moves, it digs a deep trench. When the ice melts, the ocean pours in and makes a fjord.

Interesting Fact: Some fjords are so deep that their bottoms are below sea level, and they can be more than 100 miles long!