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Across
  1. 5. melted rock beneath the earth's surface
  2. 6. a black/gray/white/pink speckled volcanic rock
Down
  1. 1. melted rock that emerges at or above the earth's surface
  2. 2. a glossy black rock formed when lava cools quickly
  3. 3. a bubbly-looking volcanic rock that floats
  4. 4. the type of rock that is made from magma/volcanic rock