Here's a breakdown:

* Magma: Molten rock found beneath the Earth's surface.

* Lava: Magma that has erupted onto the Earth's surface.

* Igneous rocks: Rocks formed when magma or lava cools and solidifies.

Igneous rocks can be classified into two main types:

* Intrusive igneous rocks: These form when magma cools and solidifies beneath the Earth's surface. They typically have larger crystals due to slower cooling. Examples include granite and gabbro.

* Extrusive igneous rocks: These form when lava cools and solidifies on the Earth's surface. They typically have smaller crystals due to faster cooling. Examples include basalt and rhyolite.