The Water Cycle Explained
Learn the water cycle for kids: evaporation, condensation, precipitation and collection. Clear diagrams in words, real examples and a quiz.
Key takeaways
- The water cycle is the journey water takes from the ground to the sky and back again
- Its main steps are evaporation, condensation, precipitation and collection
- Heat from the Sun powers the whole cycle
- The same water has been recycled on Earth for billions of years
Water on the move
Water never sits still for long. It is always on a journey — up into the sky, across the land, and back down again. We call this journey the water cycle. It happens all around you, every single day.
The amazing part? Earth doesn't make new water. The same water keeps going round and round. Let's follow a single drop on its adventure.
Step 1: Evaporation ☀️
Our drop starts in the ocean. The Sun shines down and warms the water. When water gets warm enough, it changes from a liquid into an invisible gas called water vapour. This change is called evaporation.
The vapour is light, so it floats up high into the sky. Water evaporates from oceans, lakes, rivers and even puddles after rain.
Step 2: Condensation ☁️
High up in the sky, the air is much colder. When the water vapour cools down, it turns back into tiny droplets of liquid water. This is called condensation.
Millions of these tiny droplets gather together to make clouds. You can see condensation at home too: look at the little drops on the outside of a cold glass of water on a warm day.
Step 3: Precipitation 🌧️
The cloud holds more and more droplets. They bump into each other and grow bigger and heavier. Soon they are too heavy to float. They fall down to Earth.
Falling water is called precipitation. It can be:
- Rain when the air is warm
- Snow when the air is freezing
- Sleet or hail when it is very cold
Step 4: Collection 🌊
The water lands on the ground. Some soaks into the soil and becomes groundwater. Some flows into streams and rivers. The rivers carry it back to the lakes and oceans. This is called collection.
And then? The Sun warms it again, and the whole cycle starts over!
See it for yourself
Try this safe experiment with an adult. Put a little water in a clear bowl, cover it with cling film, and leave it in a sunny window. After a few hours, look for tiny droplets on the underside of the film. You have made evaporation and condensation — your own mini water cycle!
You can also watch real condensation by breathing onto a cold window. The cloud you make is water vapour from your breath cooling down.
Why it matters
The water cycle gives us fresh water to drink, helps plants grow, and shapes weather all over the world. Without it, there would be no rain and no life.
Curious about what plants do with all that water? Read The Parts of a Plant. To explore weather more deeply, try Climate and Weather: What's the Difference?.
Quick quiz
Test yourself and earn XP
What gives the water cycle its energy?
Heat from the Sun warms water and makes it evaporate, which starts the whole cycle.
What is it called when water turns into vapour and rises into the air?
Evaporation is when liquid water turns into invisible water vapour and rises.
How do clouds form?
When water vapour rises and cools, it condenses into tiny droplets that gather as clouds.
Which of these is a type of precipitation?
Rain, snow, sleet and hail are all types of precipitation — water falling from clouds.
Where does most evaporated water come from?
Oceans cover most of Earth and provide most of the water that evaporates.
FAQ
Yes! Water is recycled over and over through the water cycle, so the water you drink could have fallen as rain on dinosaurs millions of years ago.
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