Select the one substance that is not a rock.
A nutshell is made by a living thing. It is not a pure substance. Andesite is formed in nature. It is a solid. Shale is formed in nature. It is not made by living things.
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.
Shale is a rock.
Andesite is a rock.
A nutshell is made by a living thing. But rocks are not made by living things.
So, a nutshell is not a rock.