Igneous Rocks
* Definition: Igneous rocks are formed from the cooling and solidification of magma (molten rock beneath the Earth's surface) or lava (molten rock erupted onto the Earth's surface).
* Types:
* Intrusive igneous rocks: Formed when magma cools and solidifies *within* the Earth's crust. They generally have larger crystals because they cool slowly. Examples: granite, gabbro.
* Extrusive igneous rocks: Formed when lava cools and solidifies *on* the Earth's surface. They usually have smaller crystals because they cool quickly. Examples: basalt, rhyolite.
So, the answer to your question is:
* A single rock can only be one type of igneous rock: either intrusive or extrusive.
* It's impossible for a rock to be both intrusive and extrusive simultaneously because these terms describe how the magma/lava cooled and solidified.
Think of it like this:
* Imagine a cake batter. If you pour it into a pan and bake it in the oven, it's like intrusive igneous rock (cools slowly inside).
* If you pour the batter onto a hot griddle, it's like extrusive igneous rock (cools quickly on the surface).
Let me know if you have any other questions!
