Rock Cycle & Minerals

Why is the word "metamorphic" appropriate for rocks of that type?

• it describes all types of rocks

• It is a scientific term

• there aren't many metamorphic rocks on Earth

• To "morph" means to change

The presence of igneous rocks in an area is most likely evidence of:

• dinosaurs

• sedimentary rocks

• volcanic activity

• sediments

How are rocks classified?

• by the way they form

• by the way they look

• by the layers present

• by the way a geologist says

What physical properties help identify minerals?

• hardness, color, luster, streak

• hardness, texture, color, magnification

• hardness, color, magnification

• hardness, texture, elements

The term foliated in rocks describes the ____ present in metamorphic rocks

• colors

• elements

• layers or bands (ribbons)

• colors and elements

What is the process that occurs when the weight of sediment layers above press down on the layers below, squeezing the particles together?

• compaction

• melting

• heat & pressure

• cooling

Which of the following best describes the luster of a mineral?

• the color of a mineral

• the way the mineral reflects light

• the crystal shape

• the chemical composition

Which of the following explains why oceanic plates subduct?

• continental crust is thicker and denser than oceanic crust

• oceanic crust is thinner and less dense than continental crust

• continental crust is thinner and less dense than oceanic crust

• oceanic crust is thinner and denser than continental crust

Why is streak an important physical property used to help identify minerals?

• streak identifies the hardness of a mineral

• streak reveals the true shape of the sediments

• streak shows the true color of a mineral

• streaks relates color to the elements present

What must have occurred to an igneous rock during formation?

• it formed from magma cooling

• it formed 1 million years ago

• it formed 250 million years ago

• it formed by sediments