Tides
⭐ MasteredTides are the rise and fall of the sea caused mainly by the Moon's gravity. Most places have two high tides and two low tides every day.
The Bay of Fundy in Canada has some of the highest tides in the world.
All about Tides
Tides are the regular rise and fall of the sea level. They are caused mainly by the Moon's gravity pulling on the oceans, and to a smaller extent by the Sun's gravity. As Earth turns, the water bulges in different places, creating high and low tides.
The highest tides, called spring tides, happen when the Sun, Moon and Earth line up.
Tides affect coasts, harbours and wildlife. Rock pool animals must survive being covered by water and then exposed to air. Ships often time their journeys to use high tides, and some power stations use the energy of the moving water.
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Real-life uses of Tides
- Helping ships enter and leave busy harbours
- Generating electricity with tidal power
- Providing rock pools and habitats for coastal creatures
Frequently asked questions about Tides
Why do tides happen twice a day?
The Moon pulls water towards it on two sides of Earth at the same time, creating two bulges of high water.
What are spring tides?
Very high tides that happen when the Sun and Moon line up with Earth, usually around new and full moon.
Is it dangerous to go to the beach at high tide?
It can be. Water can rise quickly and cut off paths, so always check tide times and ask an adult before going to the coast.