Geologists classify rocks by observing all of the following characteristics of rocks except:

A rock's ____________ provides clues to the rock's mineral composition

By observing the shape and color of of crystals, geologists can identify the ________that a rock contains.

This describes the look and feel of a rock's surface

Particles of minerals or other rocks that make up most rocks

A rock that contains grains that are large and easy to find are called

Rocks that contain grains that are so small they have to be seen under a microscope are

Grains in rocks often form different _______. Some lie flat, some have swirls or different colors.

There are 3 major rock classifications; which choice does NOT belong

This type of rock is formed from the cooling of magma or lava

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