8th Grade Rocks and Minerals Retest

Which mineral in the table is the softest?

• diamond
• microcline
• talc
• gypsum

What is the correct order for the rock samples?

• A B C D
• D A C B
• B D A C
• A C B D

The following picture is an example of _____

• cleavage
• fracture

The property of a mineral that shows how it reflects light is called _____

• luster
• cleavage
• streak
• fracture

The property of a mineral that causes it to break with rough or jagged edges is called _____.

• luster
• cleavage
• streak
• fracture

Magma that cools below Earth's surface forms _____ rock.

• extrusive metamorphic
• extrusive igneous
• intrusive metamorphic
• intrusive igneous

The property of a mineral that causes it to break in a smooth, flat plain is ___.

• luster
• cleavage
• streak
• fracture

Sedimentary rocks are _____.

• formed from magma
• a type of foliated igneous rock
• formed because of changes in temperature and pressures or the presence of hot, watery fluids
• formed when loose materials become pressed or cemented togehter or when minerals form from solutions

The property of a mineral that shows the color of its powder is called ___.

• luster
• cleavage
• streak
• fracture

A rock is _____.

• always made of molten material
• a mixture of minerals, organic matter, volcanic glass, or other materials
• a pure mineral
• either igneous or sedimentary