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1️⃣ What is rust?

• Rust is a reddish-brown layer that forms on iron.
• Rust is a new substance, not just dirt.
• Its scientific name is iron oxide.

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2️⃣ What does iron need to rust?

Iron needs two things to rust:

🌬️ Air (Oxygen)

• Oxygen is present in the air.

💧 Water (Moisture)

• Rain, humidity, or water helps rust form faster.

🧠 Easy rule:

Iron + Oxygen + Water = Rust

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3️⃣ What really happens?

• Iron reacts with oxygen and water.
• This reaction is called oxidation.
• Slowly, iron changes into rust.

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4️⃣ Why does rust weaken iron?

• Rust is soft and flaky.
• It does not protect iron.
• So iron keeps rusting until it becomes weak.

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5️⃣ How can we stop rusting?

• Paint blocks air and water.
• Oil or grease keeps moisture away.
• Galvanizing (coating with zinc) protects iron.
• Stainless steel has special metals that resist rust.

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⭐ Fun facts for kids

• Ships and bridges need special paint to stop rust.
• Iron rusts faster near the sea because of salty air.
• Gold does not rust!

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🧠 Easy to remember

Rust = Iron + Air + Water

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