Most of earth's mass is in the ___.

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

The center of the earth is called the ___.

Rock formed from magma or volcanic lava is called ___.

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

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

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

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

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

A substance made of things that were never alive is called ___.

a type of igneous rock

a type of metamorphic rock

a sedimentary rock

the loose material on the surface of the earth in which plants can grow

a rock-like substance that forms from decayed plant matter

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