Select the one substance that is not a rock.
Diorite is formed in nature. It is a solid. Quartzite is formed in nature. It is a solid. Ceramic is made in a factory. It is a solid.
Rocks are made of minerals. Here are some properties of rocks:
They are solid.
They are formed in nature.
They are not made by living things.
They are not pure substances.
Compare the properties of each substance to the properties of rocks. Select the substance whose properties do not match those of rocks.
Diorite is a rock.
Ceramic is made in a factory. But all rocks are formed in nature.
So, ceramic is not a rock.
Quartzite is a rock.