what three groups are rocks classified into?
igneous, sedimentary, and metamorphic
what does igneous rock form from?
magma is a mix of...
molten rock and other gases
Magma that flows out of volcanoes is called...
how does igneous rock form?
When molten material cools and solidifies
What is an intrusive rock?
igneous rock that forms underground from hardened magma
What is an extrusive rock?
igneous rock that forms at earth's surface