Question

the lava spreads on an area around the mouth of the crater. explain why this is a physical change?
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Answer 1

Answer:

As the magma approaches the surface the pressure on it decreases. The gas in the magma starts forming bubbles and the bubbles keep growing larger. The expanding and bursting bubbles force the lava into the air.

Answer 2

Explanation:

As the magma approaches the surface the pressure on it decreases. The gas in the magma starts forming bubbles and the bubbles keep growing larger. The expanding and bursting bubbles force the lava into the air

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