Volcanoes: Magma aur Pressure

Kyun volcano erupt hota hai? Magma ke andar kya force hoti hai?

Earth ke andar bahut garam magma hota hai, aur pressure se yeh upar aana chahta hai.

Magma ek liquid rock hota hai jo Earth ke mantle mein banta hai.

Jab magma garam hota hai, toh yeh expand karta hai aur pressure badh jata hai.

Yeh pressure magma ko upar push karta hai, cracks ke through crust mein.

Jab magma surface par aa jata hai, toh usse lava kehte hain. Volcanoes mostly tectonic plate boundaries par hote hain, jahan plates move karte hain.

• Magma = underground, Lava = surface par

Divergent boundaries mein plates alag hote hain, aur magma upar aata hai.

Convergent boundaries mein plates ek dusre ke taraf move karte hain, aur ek plate neeche jata hai. Jab ek plate neeche jata hai, toh yeh melt hota hai aur magma banta hai.

Yeh magma bahut explosive hota hai kyunki usme gases hote hain. Ek example: Mount Vesuvius Italy mein convergent boundary par hai.

• Gases = water vapor, carbon dioxide, sulfur dioxide

Quiz: Agar magma underground hai toh usse kya kehte hain? Volcanoes erupt kyunki magma ke andar pressure aur gases hote hain jo upar aana chahte hain.

• Pressure + Heat + Gases = Eruption!