The Water Cycle


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Today, we’re going to learn about two important processes that occur in our everyday lives – evaporation and condensation. These processes are all about how water changes from one state to another. Let’s dive right in!

1. What is Evaporation?

Evaporation is a process in which water changes from a liquid to a gas. This happens when water is heated, and its molecules gain energy, becoming more active. These energetic molecules escape from the surface of the water and turn into water vapor. You can think of it like water disappearing into the air.

2. How Does Evaporation Occur?

Evaporation occurs all around us. For example, when you leave a wet towel out in the sun, it dries up because the water in it is evaporating. Similarly, puddles on the ground after rain gradually disappear due to evaporation. Even when you’re sweating, your sweat evaporates, cooling your body.

3. What is Condensation?

Condensation is the opposite of evaporation. It’s when water vapor (gas) changes back into liquid water. This happens when the water vapor cools down and loses energy. The molecules slow down and come closer together, forming tiny water droplets.

4. How Does Condensation Occur?

Condensation is responsible for the formation of clouds. When warm, moist air rises and meets cooler air high up in the atmosphere, the water vapor in the warm air cools down and condenses into tiny water droplets. These droplets gather together to create clouds. You can also see condensation on a cold glass of water – water droplets form on the outside of the glass as the air around it cools the water vapor. 5. Real-Life Examples:

  • Morning dew on the grass is a result of condensation. During the night, the ground cools down, and the moisture in the air condenses on the surface of the grass.
  • Boiling water on a stove: As the water boils, you can see steam rising from the pot. This steam is water vapor formed through evaporation.

6. Importance of Evaporation and Condensation:

These processes are crucial for the water cycle, which helps distribute water around the Earth.

Evaporation from oceans, lakes, and rivers leads to the formation of clouds, which then release the water as precipitation (rain or snow). This water eventually returns to the ground, completing the cycle.

7. Recap:

  • Evaporation is when water changes from a liquid to a gas due to heating.
  • Condensation is when water vapor changes back into liquid water due to cooling.
  • Both processes are part of the water cycle, which helps distribute water around the Earth.

Conclusion: So, now you know about evaporation and condensation, two processes that are part of the water cycle and play a big role in our weather patterns and daily lives. The next time you see steam rising from a cup of hot chocolate or notice clouds in the sky, you’ll understand how these amazing processes work!

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