- 2066 Bhadra (old course) · 2 marks
Magma versus lava
Short answer
Magma is molten rock with dissolved gases beneath the Earth's surface, solidifying into intrusive rocks like granite. Lava is magma that has erupted onto the surface, lost most gases, and cools to form extrusive rocks like basalt.
Differentiate between magma and lava.
| Point | Magma | Lava |
|---|---|---|
| Definition | Molten rock material with dissolved gases below the earth's surface | Molten rock that has erupted onto the surface, having lost most of its gases |
| Location | Underground (magma chamber) | On the earth's surface |
| Gas content | High | Low (gases escaped) |
| Temperature | Higher (700 - 1300 °C) | Slightly lower, cools quickly |
| Solidifies to | Intrusive (plutonic) rocks like granite | Extrusive (volcanic) rocks like basalt |
✓ Answer checked by Claude Opus 5.5 (high effort)
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