How Might Salmon Use Earth’s Magnet to Return to Their Home River?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How might salmon use Earth’s magnet to return to their home river?

The Big Idea

Salmon begin their lives in a small river. They swim out to the ocean for years, and then return to the very same river where they were born. How do they find it? Let's explore a magnetic idea!

Born in a River

Step one: born in a river. Salmon hatch in rivers, swim to the ocean for years, and return to the river where they were born. It is a long and difficult trip.

A Magnetic Memory

Step two: a magnetic memory. Scientists think salmon may remember the magnetic field of the river mouth. Because the field changes slowly from place to place, each area has its own magnetic signature.

Smell Finishes the Job

Step three: smell finishes the job. Smell is also very important once they get close to the river. The idea is still being tested, with evidence from studies of sockeye salmon.

A Closer Look

Let's take a closer look! Salmon hatch in a river. They spend years in the ocean. They may use a magnetic signature. Smell helps near the end.

Quick Facts

Quick facts! Scientists have found evidence in studies of sockeye salmon. Each place has its own magnetic signature. Smell matters a lot near the river. The idea is still being tested.

Think Like a Scientist

Now, think like a scientist! Mark a river mouth on a map. Draw a path from the ocean. Add two clues, one magnetic and one smell. Show how they help a salmon find the river. Share your results with someone you love.

Outro

Salmon may use Earth's magnetic signature, and then smell, to find the river where they were born. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!