Answer:
When lava cools down and solidifies, it can form two main types of rocks: igneous rocks. The type of igneous rock that forms depends on how quickly the lava cools and where it cools. Here are the two main types:
1, Extrusive Igneous Rocks: These rocks form when lava cools quickly on the Earth's surface. Because they cool rapidly, they typically have fine-grained textures. Common examples of extrusive igneous rocks include basalt (which is often found in volcanic areas), pumice, and obsidian.
2, Intrusive Igneous Rocks: These rocks form when lava cools slowly beneath the Earth's surface. Since they cool slowly, they usually have coarse-grained textures. Common examples of intrusive igneous rocks include granite and diorite. Granite, for example, is often used for countertops and monuments.
So, whether lava becomes an extrusive or intrusive igneous rock depends on the cooling rate and location of the cooling process.