36) which of these provides the best evidence of the environment in which an igneous rock was formed?* a)…

36) which of these provides the best evidence of the environment in which an igneous rock was formed?* a) thickness b) color c) size d) texture 37) extrusive rocks have small grains because they —* a) cool quickly b) harden underground c) contain rare minerals d) have a rough mixture 38) look at image 12 on the reference sheet. the macuahuitl, or “aztec obsidian sword,” is wood with obsidian on its sides. how does obsidian used in this way make the weapon more dangerous? a) obsidian doesn’t easily break so it can be used for a long time without needing repair b) obsidian is made out of organic material so it can poison an enemy c) obsidian is used to make nether portals it lets a person transport into an enemy camp d) obsidian is volcanic glass so it has very sharp edges that can easy cut

36) which of these provides the best evidence of the environment in which an igneous rock was formed?* a) thickness b) color c) size d) texture 37) extrusive rocks have small grains because they —* a) cool quickly b) harden underground c) contain rare minerals d) have a rough mixture 38) look at image 12 on the reference sheet. the macuahuitl, or “aztec obsidian sword,” is wood with obsidian on its sides. how does obsidian used in this way make the weapon more dangerous? a) obsidian doesn’t easily break so it can be used for a long time without needing repair b) obsidian is made out of organic material so it can poison an enemy c) obsidian is used to make nether portals it lets a person transport into an enemy camp d) obsidian is volcanic glass so it has very sharp edges that can easy cut

Answer

Answer:

  1. d) Texture
  2. a) cool quickly
  3. d) Obsidian is volcanic glass so it has very sharp edges that can easily cut

Brief Explanations:

  1. Texture of igneous rocks reveals cooling - rate and environment.
  2. Extrusive rocks cool fast on surface, leading to small grains.
  3. Obsidian's sharp edges from being volcanic glass make weapon dangerous.