1 .		Louis A. Frank of the University of Iowa has claimed that the Earth is being barraged every day by thousands of large snowballs, which break up and, in theory, add water to the Earth-Atmosphere system. If his claim is true, how would this affect the Earth-Atmosphere system? (Hint: Think about open vs. closed systems) You can read more about this controversial idea at Science News On-line and at the University of Iowa's Small Comets site.   To create paragraphs in your essay response, type <p> at the beginning of the paragraph, and </p> at the end.
2 .		Just for fun: Have you ever tried to color in countries or states on a map with a few colors, only to end up coloring two adjacent countries the same color because you ran out of colors? Believe it or not, this is a complex mathematical question. Can you come up with a solution? If not, you can read about some solutions at Science News On-line.   To create paragraphs in your essay response, type <p> at the beginning of the paragraph, and </p> at the end.