Rock and Minerals Unit Test Practice

A mineral is inorganic, which means it contains

• compounds
• materials made by humans
• living things
• nonliving things

The repeating pattern of a mineral's particles forms a solid called a

• crystal
• element
• compound
• rock

____ the hardest known mineral

• quartz
• talc
• diamond
• gold

Most minerals do not break evenly. Instead they have a characteristic type of irregular breakage

• cleavage
• fracture
• crystal
• luster

The softest mineral on Moh's Hardness Scale

• quartz
• talc
• diamond
• gold

Igneous Rock cools very quickly when it forms a texture that is

• smooth and shiny with no visible grain
• multicolored and banded
• coarse grained
• nonbanded

When all the grains in the rock are large and easy to see, the rock is described as 

• extrusive
• fine grained
• coarse grained
• nonbanded

To describe a rock's texture, geologists determine

• the color and density of the rock
• how the rock formed
• how many minerals the rock contains
• the size, shape, and pattern of the rock's grains

Rock that forms from the cooling of magma below the surface or lava above the surface is called

• sedimentary
• metamorphic
• igenous

Igneous rock that formed from lava on the Earth's surface

• extrusive
• intrusive
• clastic
• organic