Magma Formation
Magma formation is a phase change where intense underground heat melts solid rock into magma—a thick, flowing liquid that serves as the raw material for all igneous rocks. In Amplify Science (California) Grade 7, Chapter 1: Rock Formations, students learn that magma can remain underground or erupt as lava, in either case eventually forming new solid igneous rock.
Key Concepts
Magma is simply rock that has undergone a phase change. Deep underground, intense heat melts solid rock into this thick, flowing liquid.
Magma serves as the raw material for all igneous rocks . Whether it remains trapped beneath the surface or erupts as lava, this molten substance holds the potential to become new solid land.
Common Questions
What is magma and how does it form?
Magma is molten rock formed when intense underground heat melts solid rock. It is a thick, flowing liquid that exists deep in the Earth's mantle and crust.
What is the difference between magma and lava?
Magma is molten rock located underground. When magma reaches the surface through a volcanic eruption, it is called lava. Both are the same material in different locations.
What types of rock does magma form?
When magma cools and solidifies, it forms igneous rock. If it cools slowly underground, large crystals form (intrusive igneous rock like granite). If it cools quickly at the surface as lava, small crystals form (extrusive igneous rock like basalt).
Where is magma formation covered in Amplify Science Grade 7?
Magma formation is covered in Amplify Science (California) Grade 7, Chapter 1: Rock Formations.