Geology: Major Groups of Rocks

A rock that forms from magma.

A mixture of molten rock and gases.

<p>Igneous rock forms when molten material cools and solidifies either inside Earth or at the surface.</p> Signup and view all the answers

<p>An igneous rock that forms underground from hardened magma.</p> Signup and view all the answers

<p>An igneous rock that forms at Earth's surface.</p> Signup and view all the answers

<p>Small, solid pieces of rock that come from rocks or living organisms.</p> Signup and view all the answers

<p>A rock that forms over time as sediment is squeezed and cemented together.</p> Signup and view all the answers

<p>Geologists classify sedimentary rocks in three main groups: clastic rocks, chemical rocks, and organic rocks.</p> Signup and view all the answers

<p>Sedimentary rocks that form from the broken fragments of other rocks.</p> Signup and view all the answers

<p>Rock that has been changed by temperature, pressure, or reactions with hot water.</p> Signup and view all the answers

<p>Metamorphic rock forms when a rock is transformed by heat, pressure, or chemical reactions.</p> Signup and view all the answers

<p>Metamorphic rocks with crystals arranged in parallel layers or bands.</p> Signup and view all the answers

<p>A series of processes in which rocks continuously change from one type to another.</p> Signup and view all the answers

<p>In the rock cycle, forces within Earth and at the surface cause rocks to change form.</p> Signup and view all the answers