1.what kinds of materials do people use to build structures?
-- Building material is any material which is used for construction purposes. Many naturally occurring substances, such as clay, rocks,sand, and wood, even twigs and leaves, have been used to construct buildings
2.Why are some materials better for projects than others ?
-- metal atom's aptitude to lose electrons to other atoms causes it to be more reactive. Involved in the scientifically determined aptitude is the speed at which a metal atom can lose electrons, as well as the substances with which the atom is likely to react
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