🌍 Gases in Earth’s Air (Atmosphere)

What we breathe & their percentages – for kids (8–10+)

When we breathe, we are breathing air, which is a mixture of gases.

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🌬️ Main gases in the air

🟦 1️⃣ Nitrogen (N₂) – 78%

• The largest part of air
• Helps plants grow 🌱
• Keeps the air stable

👉 Even though it’s most of the air, our body does not use nitrogen directly.

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🟩 2️⃣ Oxygen (O₂) – 21%

• The gas we need to breathe
• Helps us get energy from food 🍎
• Needed for fire 🔥

👉 Without oxygen, humans and animals cannot survive.

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🟨 3️⃣ Argon (Ar) – 0.93%

• A harmless gas
• Does not react much
• Used in light bulbs 💡

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🟫 4️⃣ Carbon Dioxide (CO₂) – 0.04%

• Very small amount
• Plants use it to make food 🌿 (photosynthesis)
• We breathe it out

👉 Too much CO₂ can cause global warming 🌍🔥

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💧 Other gases (very tiny amounts)

• Water vapor 💦 (causes clouds and rain)
• Neon
• Helium
• Methane
• Ozone (protects us from Sun’s harmful rays ☀️)

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📊 Simple percentage chart (easy to remember)

• Nitrogen → 78%
• Oxygen → 21%
• Other gases → 1%

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🧠 Easy way to remember

Air is mostly nitrogen, enough oxygen to live, and a tiny bit of other gases

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🌟 Fun facts for kids

• Every breath you take has billions of gas molecules
• Astronauts need oxygen tanks in space 🚀
• Plants and humans depend on each other for oxygen & CO₂ 🤝

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📌 One-line summary

Earth’s air is made mostly of nitrogen, oxygen for breathing, and small amounts of other gases.

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