Across
- 4. The spin of a body or object on its axis. This motion of the Earth creates day and night.
- 5. Negatively charged subatomic particle found outside of the nucleus in the electron cloud and has very small mass
- 7. The speed of an object in a particular direction.
- 9. The boundary between two tectonic plates that are sliding past each other horizontally.
- 12. Refers to the brightness of a star.
- 15. The unit used to measure force
- 17. The tendency of an object to resist changes in motion. The more massive an object is, the more inertia it has.
- 18. Any living thing that must eat other organisms to obtain energy necessary for life.
- 19. The vertical rows of the elements on the periodic table which determine the number of valence electrons on the outermost energy level of the electron cloud
- 20. A collection of dust and gases that forms stars and often result from dying stars.
Down
- 1. The substances that are produced as a result of a chemical reaction found on the right side of the yield arrow
- 2. A sphere of matter with a density and a temperature great enough to cause a nuclear reaction at its center, producing light.
- 3. Any movement of matter that results from differences in density; may be vertical, circular, or cyclical.
- 6. The motion of an object that travels around another object. This motion of Earth around the Sun creates the seasons.
- 8. A force between two objects in contact (often sliding, or trying to slide, over one another)
- 10. The energy an object has because of its motion.
- 11. Organism that can make its own food through photosynthesis by synthesizing organic nutrients using energy from sunlight.
- 13. An atom’s core region which is made up of protons and neutrons; has an overall positive charge and large mass
- 14. Equal and opposite forces acting on an object; result in no change of position, direction, or motion (no acceleration).
- 16. A push or a pull