Describe (in full sentences) what happens in early development using the words zygote, sperm, egg, fertilization, blastula, implantation, mitosis, stem cells, growth, differentiation.

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.