Across
- 4. The star in the center of our solar system around which Earth and 7 other planets revolve.
- 9. The preserved remains or impressions of organisms of Earth's gelogical past.
- 12. A large group of asteroids that orbits the sun between Mars and Jupiter.
- 13. A meteroid that strikes a planet, moon, or asteroid.
- 15. The main part of a comet, which is made of ice, gas, and dust.
- 17. The tendency of an object to remain either at rest or in motion unless acted on by an outside force.
- 19. The entirety of everything that is known to exist in space.
- 21. A small; mostly rocky solar system object that orbits independently around the sun; minor planet.
- 24. A celestial body composed of a mixture of rocks; frozen gases, cosmic dust, water, ice, and organic compounds that orbit the sun in a variety of elliptical paths that pass close to the sun and swing to the outer reaches of the solar system.
- 27. Of or having to do with solid rock; name given to the four inner planets.
- 29. Law stating that any two objects in the universe have gravity and will attract each other, and that attraction depends on how much mass each object has and their distance from eah other.
- 32. Law stating that body in motion tends to trael at a constant speed in a straight line unless an outside force disturbs it.
- 33. A rocky object that orbits a planet; a natural satellite.
- 34. A force of attraction between two objects.
- 35. The center of a planet, star, or moon.
Down
- 1. An observed pattern of stars.
- 2. The mixture of gases that surrounds a planet or moon.
- 3. A physcial feature of a planets surface, such as a mountain plain, or valley.
- 5. The time it takes an object to orbit another object one complete time.
- 6. A solid object moving in interplanetary space, distinguished from asteroids and planets by its smaller size.
- 7. A massive, usually spherical space object that orbits a star and shines by reflecting the stars light.
- 8. An angular distance on a globe that runs parallel (East and West) to the equator; measured in degrees North and South of the equator.
- 10. The total amount of matter in an object; not dependent upon gravitational pull.
- 11. The time it takes an object to spin on its axis in one complete rotation.
- 14. The process by which terrestrial planetary materials are broken down and moved from place to place, for example, by wind and water.
- 16. A bowl shaped pit on a planet, moon, or asteroid formed by the impact of an object; also formed by volcanoes.
- 18. A star with planets and other objects in orbit around it; our solar system is made up if the sun, either planets, asteroids, meteoroids, comets and other space objects.
- 20. A measure of the force of gravity on an object.
- 22. Scientist who studies life forms of the past.
- 23. The streak of light that is produced when a meteroid burns as it enters an atmosphere.
- 25. A sphere of hot glowing gases that releases energy in the form of heat and light.
- 26. Type of fossil that forms when sand, minerals, or other matter fill a cavity-shaped mold over time and then harden, forming a replica of the original organism.
- 28. An angular distance on a globe that runs perpendicular (North and South) to the equator; measured in degrees east and west.
- 30. A large system of dust, gas, stars, and other celestial bodies that has a particular shape.
- 31. A scientist who studies the stars, planets, and other objects in space.