A comet is a small celestial body made of ice and dust that orbits the sun in an elliptical or oval path. Because the path is not perfectly circular, sometimes the comet is closer to the sun, and sometimes it is farther away from the sun. As the comet approaches the sun, the comet begins to warm up, and some of the dust and ice begins to stream away, forming the long, distinctive comet tail. Some scientists consider comets to be the most interesting of the celestial bodies.Based on this information, which of the following statements is an opinion rather than a fact?

The Science section of the GED lasts 90 minutes and contains 50 questions. The science section tests your ability to work with science information from life science, physical science, and earth and space science.