Rocks and Minerals UNIT 2 SCIENCE

Which process begins the formation of sedimentary rock?

• the movement of sediment

• the cementation of rock sediment

• the breakdown of rock into sediment

• the buildup of sediment in one location

An igneous rock floats because air bubbles became trapped when molten material erupted from an underground volcano. How else can this rock be accurately described?

• intrusive

• extrusive

• large crystals

• coarse texture

Which characteristic is best for identifying whether a rock is intrusive or extrusive?

• color

• shape

• texture

• weight

Fran finds a dark-colored rock that she identifies as basalt. Which property gives the rock its dark color?

• its shape

• its banding

• its grain size

• its mineral content

A mineral forms in water heated by magma inside Earth. Which statement best describes this mineral?

• The mineral formed through evaporation.

• The mineral crystallized from molten material.

• The mineral formed when a hot water solution cooled.

• The mineral likely has all the same properties as the surrounding rock.

Which type of rock is most likely to form because of high heat and pressure?

• igneous

• magma

• sediment

• metamorphic

Which phrase describes how metamorphic rocks form?

• form from melting

• form at Earth’s surface

• form from sediments

• form from existing rocks

Which rock is an example of a clastic sedimentary rock?

• shale

• iron ore

• rock salt

• limestone

Which correctly lists three properties that are used to identify minerals?

• luster, weight, streak

• magnetism, size, weight

• size, weight, luster

• streak, luster, magnetism

Which phrase describes non-foliated rocks?

• have grains in parallel layers

• include quartzite and marble

• tend to split along their bands

• form from crystallized magma