Imagine a cup of water. You leave it outside. After some time , the water level goes down.

🧐 Where did the water go?

➡️ The top water particles got super excited (they had more energy) and escaped into the air as invisible gas (called water vapor).

🎉 That’s evaporation — when only the top layer of a liquid slowly turns into gas.

🧠 Key Point:

• Happens at any temperature

• Only some molecules escape

• Happens slowly and from the surface

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❄️ What is Cooling by Evaporation?

Now, let’s say you're sweating on a hot day.

🌡️ Your sweat starts to evaporate.💧 But to do that, it needs energy to escape.So, it steals heat from your skin!

That’s why you feel cooler. ❄️

🧠 Key Point:

• Evaporation takes away heat 🥵➡️😌

• That’s why wet clothes feel cool

• Fans make evaporation faster → more cooling!

  
  

🔥 What is Boiling?

Now picture a pot of water on the stove.

You turn on the heat. It gets hotter… and hotter…

🥵 Suddenly — bubbles! All the water starts turning to steam!

🎉 That’s boiling — when the whole liquid (not just the top) turns into gas. It’s like evaporation’s supercharged cousin!

🧠 Key Point:

• Happens at a specific temperature (like 100°C for water)

• Happens throughout the whole liquid

• Is fast and makes bubbles