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20 Multiple choice questions

  1. Peridotite
  2. vesicle
  3. highly viscous; cools quickly
  4. phaneritic
  5. The rock is crystalline; mineral grains are too small to be visible without a magnifying lens or microscope.
  6. felsic
  7. Pumice
  8. andesite, rhyolite
  9. Andesite
  10. glassy
  11. Phaneritic
  12. Basalt
  13. texture
  14. phaneritic
  15. porphyritic
  16. olivine
  17. Pegmatite
  18. aphanitic
  19. The extrusive magma cools quickly so the mineral grains do not have time to grow.
  20. Diorite