Here's a breakdown:
* Molten material: This refers to magma (molten rock beneath the Earth's surface) or lava (molten rock that has erupted onto the Earth's surface).
* Cooling and solidifying: As the molten material cools, it crystallizes and forms solid rock.
There are two main types of igneous rocks:
* Intrusive igneous rocks: These form when magma cools and solidifies beneath the Earth's surface. They tend to have larger crystals due to the slower cooling process. Examples include granite and gabbro.
* Extrusive igneous rocks: These form when lava cools and solidifies on the Earth's surface. They tend to have smaller crystals due to the faster cooling process. Examples include basalt and rhyolite.
