Rocks and Minerals Review Common Assessment

CHOOSE ALL THAT APPLY:

Which three tests do we use to identify minerals? (Page 16)

• Hardness

• Composition

• Luster

• Streak

• Cleavage

This is when a mineral has sharp angles and looks like it could be broken off in cubes or 90 degree angles.

• Cleavage

• Fracture

This is when a mineral has uneven breakage.

• Cleavage

• Fracture

This test is performed on a white tile to see if the mineral leaves behind any colored powder.

• Hardness Test

• Streak Test

This test is performed on a glass plate to see if the mineral will scratch the glass.

• Hardness Test

• Streak Test

Why do minerals have different shapes?

• light reflects off the crystals surface

• energy is released during crystallization

• impurities that produce surface variations

• the internal structure of atoms

Which process is needed for the formation of igneous rocks? (page 6)

• erosion

• deposition

• solidification

• metamorphism

This rock is nonfoliated and forms by only contact metamorphism.

• conglomerate

• hornfels

• pegmatite

• quartzite

How are igneous rocks formed?

• magma solidifies slowly, resulting in a coarse-grained texture

• magma solidifies slowly, resulting in a fine-grained texture

• magma solidifies rapidly, resulting in a glassy texture

• magma solidifies rapidly resulting in a clastic texture

Where would you naturally find rock salt? (think about if each of these can be salty!)

• active volcanoes

• continental ice sheets

• fault zones in the crust

• shallow evaporating seas