Ch 1 5th

Rock formed from magma or volcanic lava is called ____.

• conglomerate

• igneous

• metamorphic

• sedimentary

Rock formed by heat and pressure deep below the earth's crust is called _____.

• conglomerate

• igneous

• metamorphic

• sedimentary

The characteristic of a mineral to break along smooth, straight lines or into flat sheets is called ______.

• fracture

• streak

• color

• cleavage

An inorganic substance found naturally in the earth is called _____.

• a mineral

• soil

• a rock

• a vein

The center of the earth is called the _____.

• mantle

• crust

• core

• soil

The thin outer layer of the earth is called the _____.

• mantle

• crust

• core

• soil

Most of the earth's mass is in the _____.

• mantle

• crust

• core

• soil

A substance made of things that were never alive is _____.

• organic

• luster

• synthetic

• inorganic

The color of the mark made when a mineral sample is rubbed on a harder surface is called _____.

• fracture

• streak

• color

• cleavage

Rock that forms when layers of sediment and organic material harden is called ____.

• conglomerate

• igneous

• metamorphic

• sedimentary