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2 Written questions

2 Multiple choice questions

  1. Cooling may be so rapid that crystals do not have a chance to form and instead a glass is prduced rapid cooling near the Earth's crust
  2. they are once molten and upon cooling, the magma (molten rock) crystallized into solid rock

1 True/False question

  1. PumiceForms rapid cooling acidic lava. Dissoves gas