Hi, My name is Christyn and today I am going to teach you all about the water cycle. Did you know that the water you’ve just swallowed is the same water that dinosaurs drank? That’s because Earth has been recycling water for over 4 billion years!The world’s water moves between lakes, rivers, oceans, the atmosphere and the land in an ongoing cycle called the water cycle.
During evaporation, energy from the sun heats up the surface of the Earth, causing the temperature of the water in our rivers, lakes and oceans to rise. When this happens, some of the water “evaporates” into the air, turning into a gas called vapor. Plants and trees also lose water to the atmosphere through their leaves. This process is known as transpiration.
As water vapor rises up high into the sky, it cools and turns back into a liquid, forming clouds. This process is called condensation. Currents high up in the air move these clouds around the globe.
When too much water has condensed, the water droplets in the clouds become too big and heavy for the air to hold them. And so they fall back down to Earth as rain, snow, hail or sleet, a process known as precipitation.
The fallen precipitation is then collected in bodies of water such as rivers, lakes and oceans from where it will eventually evaporate back into the air, beginning the cycle all over again. How it is collected, depends on where it land. Some will fall directly into lakes, rivers or the sea, from where it will evaporate and begin the cycle all over again.If the water falls on vegetation, it may evaporate from leaves back into the air, or trickle down to the ground. Some of this water may then be taken up by the plant roots in the earth.