3.09 Mid Unit Quiz

Why is coal not classified as a mineral?

• It is not a solid

• It doesn't occur naturally

• It is organic

• It doesn't have a chemical composition.

Which mineral property is easily observed, but can be unreliable when it comes to mineral identification?

• Streak

• Hardness

• Luster

• Color

Which mineral property describes a mineral’s resistance to being scratched?

• Luster

• Color

• Hardness

• Streak

A rock containing valuable minerals that can be mined is called __________.

• mineral

• ore

• rock

• precipitate

What are elements that lose electrons and form positive ions called?

• Metals

• Non metals

• solids

• gases

What kind of crystal is halite crystal (rock salt)?

• monoclinic

• cubic

• tetrahedral

• rhombic

How do igneous rocks form?

• Cooling of magma/lava

• Adding heat/pressure to a pre existing rock

• Erosion

• Sedimentation and compaction

Which type of sedimentary rock is formed from fragments of minerals or rocks?

• Chemical precipitate

• Clastic

• Fossiliferous

• Instrusive

How are igneous rocks classified?

• Color

• Texture and composition

• Cooling time

• Degree of Foliation

A metamorphic rock has grains arranged in parallel layers or bands. What property is this rock displaying?

• Foliation

• Non foliation

• stratifcation

• layering