Have you heard of these rocks before?
1) IGNEOUS ROCKS-
Igneous rocks are types of rocks that have crystals inside them.
When the molten magma rises to the earths surface it then cools down into Igneous rocks.The Latin word for 'Igneous' is 'Ignis' which means fire. Pumice is an Igneous rock too.
2) SEDIMENTARY ROCKS-
Sedimentary rocks are made out of tiny grains of sand, clay, rock, plants, and animal skeletons. They fall down onto the ocean floor and over millions years, these are pressed together by the weight of water and layers of sediment on top to make Sedimentary rocks(the word 'sediment' means to 'settle in layers').
They also can have fossils inside them.
Limestone is a Sedimentary rock.
3) Metamorphic ROCKS-
Did you know deep in the earth's crust, rocks are crushed and 'cooked' into new rocks, that's why they are very hard. These rocks are called Metamophic('meta' means 'changed', and 'morph' means 'shape'). Marble is also a Metamorphic rock.