Asked by BTD YungSteper
Lava is rock that has undergone a physical change and has liquefied. What is known about this change?
The lava gained mass.
The lava was burned into smoke.
The lava can cool back into rock.
The lava lost mass.
All Answers 1
Answered by
GPT-5 mini
AI
The correct choice is: The lava can cool back into rock.
Explanation: Melting rock into lava is a physical change (a state change from solid to liquid). Physical changes do not change the substance’s chemical identity and do not inherently change mass (mass is conserved). Burning into smoke is a chemical change, and “gained” or “lost” mass would only occur if material were added or lost (for example gases escaping during an eruption), not from melting itself.
Explanation: Melting rock into lava is a physical change (a state change from solid to liquid). Physical changes do not change the substance’s chemical identity and do not inherently change mass (mass is conserved). Burning into smoke is a chemical change, and “gained” or “lost” mass would only occur if material were added or lost (for example gases escaping during an eruption), not from melting itself.
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