Tidal Energy

The ocean has tides that come in and go out twice every day. This moving water is very strong. People have learned to catch the power of the tides and turn it into electricity. This is called tidal energy, and it is one way to make clean power.

How It Works

Tidal energy uses big machines called turbines. The turbines sit under the water and look like giant fans. When the tide moves in or out, the water pushes the blades around. The spinning blades turn a motor that makes electricity. The power is then sent to homes and schools through wires.

Good and Tricky Parts

Tidal energy is very clean because it does not make smoke. The tides are also easy to predict, since they follow the moon. But tidal machines cost a lot to build. They also need to be placed in just the right spots where the tides are strong. Scientists are working to make them better and cheaper.

Fun Facts

• The moon's gravity is what makes the tides rise and fall.
• The world's first big tidal power plant was built in France in 1966.
• Tidal turbines can last for more than 20 years under the sea.

Did You Know?

The Bay of Fundy in Canada has some of the biggest tides in the world, rising as high as a four-story building.