Across
- 2. a model representing the sun as its center
- 4. is the solid core of a comet.
- 8. best known for his three laws of planetary motion.
- 9. -earthquake is the sudden shaking caused by tectonic plates.
- 12. comes close but only approaches earths orbit
- 13. a scale used to measure intensity of an earthquake.
- 15. the other planets that orbit the sun lie near the plane of earths orbit.
- 17. amount of light reflected by a celestial object.
- 19. a distant, beyond neptune disc.
- 20. when a meteor survives earths atmosphere.
- 21. where asteroids originate, lies between mars and jupiter.
- 23. a blanket of gases that surround the earth.
- 25. is one of the famous craters on earth.
- 26. celestial event when several meteors enter earths atmosphere.
- 29. method of determining a location using 3 seismograph stations
- 31. effect the sppining of earth on its axis produces the movement of air
- 33. is the only known short-period comet.
- 34. the closest distance from the sun is called?
- 35. called shooting or falling star.
Down
- 1. the belief that earth was the center of the solar system.
- 3. a scale used to measure magnitude of an earthquake.
- 5. liquids that evaporate quickly
- 6. is a long-period comet.
- 7. used to measure air pressure
- 10. forms around the comets nucleus when close to the sun.
- 11. this meteor shower happens every 75-76 years.
- 14. also called miniature planets
- 16. meteor showers that come from asteroid 2003EH1.
- 17. the farthest distance from the sun is called?
- 18. short-term or day to day condition of the atmosphere.
- 22. is a break in the rocks that make up the earths crust.
- 24. a group of stars.
- 27. imaginary elliptical line where the planets move around the sun.
- 28. cross but spend most of their time in earths orbit.
- 30. composed of rock dust, ice, and some metal material.
- 32. a large spherical cloud around the orbits of the planets.