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🌡️ What is a Barometer?

A barometer is a weather instrument.

👉 It is used to measure air pressure.

Air pressure tells us how heavy the air is pushing down on Earth.

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🌬️ What is air pressure?

Even though air is invisible, it has weight.

• The air around us pushes down
• This push is called air pressure

A barometer helps us measure this push.

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☀️ How does a barometer help us?

Barometers help predict weather changes.

• High air pressure → usually clear and sunny weather ☀️
• Low air pressure → often cloudy, rainy, or stormy weather 🌧️🌩️

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🧪 How does a barometer work? (simple)

There are two common types:

1️⃣ Mercury Barometer

• Uses a liquid metal called mercury
• Air pressure pushes the mercury up or down in a glass tube

2️⃣ Aneroid Barometer

• Uses a small metal box
• The box expands or shrinks when air pressure changes
• A pointer shows the pressure

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🌍 Where are barometers used?

• Weather stations
• Ships and airplanes
• Homes and schools
• By meteorologists (weather scientists)

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🌟 Fun facts for kids

• Air pressure changes with height
• Pressure is lower on mountains
• Barometers helped sailors avoid storms
• Phones and smartwatches can have tiny barometers!

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🧠 Easy way to remember

Barometer = measures air pressure
Air pressure helps us know the weather

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