How are stone tools or sharp sticks technology

They aren't but if your considering the stone ages then say they were the "biggest thing of that time" as if technology is the biggest thing today, not an easy one

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).