Obsidian, pumice, and scoria have fine grained or no visible crystals because they were formed. a) (cooled fast/cooled slow) b) (inside/outside) c) (above the earth's surface/below the earth's surface) d) intrusive/extrusive)

Obsidian, pumice, and scoria have fine grained or no visible crystals because they were formed.

a) (Cooled fast/Cooled slow)

b) (inside/outside)

c) (above the Earth's surface/below the Earth's surface)

d) (intrusive/Extrusive)

lesson summarykaryotypes a genome is the full set of all the genetic information that an organism carries in its dna. chromosomes arebundles of dna and protein found in the nucleus of a eukaryotic cell.