Definitions
a solid, natural material found in the Earth.
mineral
a solid material made of one or more minerals
rock
fossils often last in sedimentary rocks because the rocks...
have layers that save animal and plant shapes
Earth's outer layer
crust
rock formed by layers of sediment pressed together over time
sedimentary rock
hard, soft
the hot iron center of the Earth
core
the middle layer of Earth made of soft, hot rock
mantle
a rock is made of...
one or more minerals
the remains or trace of a living thing that lived long ago
fossil
the process where rocks change from one type to another over time
rock cycle
as you go deeper into Earth, the pressure....
increases and gets hotter.
rock that has been changed by heat and pressure inside the Earth
metamorphic rock
rock formed when melted rock (magma or lava) cools and hardens
igneous rock
heat helps form...
igneous and metamorphic rocks