An igneous rock forms quickly. Which characteristic could the rock have?
evidence of folding
large mineral crystals
smooth, sharp texture
small sand grains
Which type of rock can be foliated?
sedimentary rock
igneous rock that cools slowly
igneous rock that cools quickly
metamorphic rock
Amber, which is made from hardened tree resin, is a gem. Although amber is often used in jewelry, it is not a mineral. Which statement explains why amber is not a mineral?
It is not natural.
It is not solid.
It is not valuable.
It is not inorganic.
Which option is a mineral?
wood
garnet
coal
pearl
Minerals must have atoms that are tightly packed together and cannot move freely. Which part of the definition of a mineral does this describe?
the requirement that minerals must be solids
the requirement that minerals must have a defined chemical composition
the requirement that minerals must have a defined crystalline structure
the requirement that minerals must be naturally occurring
