Select the one substance that is not a rock.
Diorite is a solid. It is not made by living things. A peach pit is made by a living thing. It is not a pure substance. Granite is a solid. It is not a pure substance.
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.
Granite is a rock.
A peach pit is made by a living thing. But rocks are not made by living things.
So, a peach pit is not a rock.
Diorite is a rock.