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.

There are two main types of igneous rocks:

* Intrusive igneous rocks: Form when magma cools and crystallizes slowly beneath the Earth's surface. These rocks have larger crystals.

* Extrusive igneous rocks: Form when lava cools and crystallizes quickly on the Earth's surface. These rocks have smaller crystals.