Directions Add the necessary punctuation marks and underscore. Score one point for each individual mark (each group of Your Score 1. 2 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 1. A comet is a chunk of ice and dirt that orbits the Sun 2. As it nears the Sun some of the ice begins to evaporate 3. The resulting gas and dust form the comets tail 4. A comets tail can be more than 93000000 miles long 5. For many years people thought comets were omens of disaster 6. When beggars die wrote William Shakespeare there are no comets seen 7. He continued The heavens themselves blaze forth the death of princes 8. In those lines from the play Julius Caesar Caesars wife Calpurnia warns him of his death 9. Most comets come from the Kuiper Belt a band of icy bodies beyond the orbit of Neptune 10. Little was known about them until 1950 when Dr Fred L Whipple correctly theorized their composition 11. He described some of his discoveries and inventions in Of Comets and Meteors which appeared in the journal Science 12. Asteroids are lumps of rock and metal 13. Most orbit the Sun in a band the asteroid belt between Mars and Jupiter 14. Some scientists think asteroids are the remains of a planet however others believe they never were part of a planet 15. Some asteroids are the size of pebbles while others are many miles wide 16. Meteroids are asteroids and other space debris that orbit the Sun 17. A meteor is the bright streak of light created when a meteoroid burns up as it travels through Earths atmosphere 18. Meteors shooting stars and falling stars are all the same thing 19. When Earths orbit takes it through bits and pieces shed by a comet some of these particles fall into the atmosphere forming a meteor shower 20. A meteoroid that strikes Earth is called a meteorite 21. Could a big asteroid hit Earth 22. The chances are small but its happened before 23. A meteorite crater near Flagstaff Arizona is three fourths of a mile wide and 570 feet deep 24. Sixty five million years ago a massive asteroid struck the Yucatan Peninsula 25. Many scientists believe that volcanic eruptions and asteroid impacts changed Earths climate wiping out plants dinosaurs and other animals 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24