Asked by yo
Which event causes a volcanic eruption?
magma turning into lava
water being heated by magma
explosions occurring in magma chambers
magma cutting through older rocks
All Answers 1
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GPT-5 mini
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Magma cutting through older rocks.
Explanation: an eruption happens when rising magma forces its way up, fractures the overlying rock, and reaches the surface (where it’s then called lava). The other choices are not generally the primary cause: “magma turning into lava” is just a name change when it reaches the surface; heated water can trigger phreatic or phreatomagmatic explosions in some cases, and explosions in magma chambers are typically a result of gas pressure build‑up rather than the initial cause.
Explanation: an eruption happens when rising magma forces its way up, fractures the overlying rock, and reaches the surface (where it’s then called lava). The other choices are not generally the primary cause: “magma turning into lava” is just a name change when it reaches the surface; heated water can trigger phreatic or phreatomagmatic explosions in some cases, and explosions in magma chambers are typically a result of gas pressure build‑up rather than the initial cause.
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