Types of Rocks: Lesson for Kids

Instructor: Josh Corbat

Josh has taught Earth Science and Physical Science at the High School level and holds a Master of Education degree from UNC-Chapel Hill.

Science is so awesome. You might even say science ROCKS! In this lesson, we will learn about the three types of rocks, what they look like, and how they are made.

Types of Rocks

There are three types of rock on Earth: Igneous, sedimentary, and metamorphic. Some things on Earth are different because of the way they look or feel. Rocks come in all shapes, sizes, and colors, though, so we can't use the way they look to tell the difference. The thing that makes each type of rock different is the way it is made. One is made when hot lava cools down and hardens. One is made when sand or other small pieces get stuck together. One is made when a rock gets buried deep and heated up a lot. Let's find out which is which!

Igneous Rock

Granite is a very common igneous rock.

Igneous rock forms when hot lava cools and hardens. This can happen in many different places on Earth, but one of the most common places is at a volcano. Some igneous rocks are smooth and others are rough, depending on where they are made. Igneous rock can be all sorts of colors and textures. Some igneous rocks are dull and boring, but others are beautiful! The rock shown is called granite. You may have seen statues or monuments made of granite because it so strong.

Sedimentary Rock

Sandstone is a common type of sedimentary rock.

Sedimentary rock is made differently than igneous rock.Instead of lava cooling, sedimentary rock is made when sand or other small pieces get stuck together. When pieces of sand get stuck together it forms a rock called sandstone, which you can see in the picture. Pieces of sand start to pile on to each other and get stuck together when they are mixed with some water. It's basically like the pieces of sand get glued together!

Metamorphic Rock

This is a type of metamorphic rock called fuchsite.

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