Choose a topic from the list below. plant or animal, cell DNA structure, solar system, layers of the earth, volcano, atomic structure, digestive system, Research the topic enough to understand the basic concepts. Make a model using materials of your choosing, or design it using a graphic program such as Word, Power Point, Publisher, or any other that you are familiar with. Be sure your model is neat, well designed, accurate, detailed, and labeled. Write a 150 word explanation of your model. Include what your model represents, why it is difficult to study in real life, and what scientists have learned from the model.