Answer:
Rocks can be divided into three basic classifications: igneous, sedimentary, and metamorphic. The following tests are used by experts to classify rocks: Hardness Test Minerals are scaled in range from 1 to 10, with 1 being softest and 10 hardest. The method of determining hardness is the scratch test.
An example of secondary pollutant is sulfurage
Sexual intercourse. The developing of the female egg cells and the production of sperm cells
The main role of ATP<span> is to provide energy
</span>energy released is used for metabolism in thecell<span>. Other reactions that require energy from </span>ATP<span> include; active transport/ muscle contraction/ glycolysis.</span>
