<span>The minerals that make up </span>rocks<span> have defined chemical </span>compositions<span> and rigid atomic structures. When sunlight strikes the </span>rock's<span> surface, the </span>composition<span> and atomic structure of the different minerals control the wavelengths they absorb or reflect.</span>
The composition of a rock is determined by the
minerals it is made of . Correct answer: C. Almost all rocks made of minerals, but different rocks contain different mixtures of minerals. There are three main groups of rocks: sedimentary, igneous or metamorphic.
