Igneous rocks

Igneous rocks form when magma or lava cools and hardens

Magma and lava whats the difference?

Magma is melted rock below the ground but lava is melted rock above the ground

Lava flowing

Pictures

Magma

Obsidian a igneous rock

http://quest.eb.com/search/Magma/1/132_1239559/Lava-flow