Across
- 2. an attractive force that exists between all objects that have mass.
- 6. a wave in which the disturbance is perpendicular to the direction the wave travels.
- 8. a tiny particle inside an atom's nucleus that has no electrical charge.
- 9. a tiny, positively charged particle found in the center of every atom.
- 14. the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer.
- 17. a material in which a wave travels.
- 18. a wave that can travel only through matter.
- 22. a measure of the distance an object travels in a given amount of time.
- 23. the interaction between electric charges and magnets.
- 24. an object at rest will stay at rest, and an object in motion will stay in motion unless a force acts on the object.
- 25. a representation of the information that is communicated.
- 28. the change in direction of a wave as it changes speed in moving from one medium to another.
- 29. contact force that resists the sliding motion of two surfaces that are touching.
- 31. the combination of all the forces acting on an object.
- 32. a device that uses an electric current to produce motion.
- 33. a process where two light atomic nuclei combine to form a heavier nucleus, releasing a tremendous amount of energy in the process.
- 34. the change in direction of a wave when it travels by the edge of an object or through an opening.
- 37. when an object applies a force on another object, the second object applies a force of the same strength on the first object but the force is in the opposite direction.
- 39. a tiny, negatively charged particle that zooms around the center of an atom.
- 40. an electric signal whose values change between two values.
- 41. a wave in which the disturbance is parallel to the direction the wave travels.
- 42. a quantity that has both magnitude and direction.
Down
- 1. a force of attraction or repulsion created by a magnet.
- 3. a magnet created by wrapping a current-carrying wire around a ferromagnetic core.
- 4. the tiny, dense, positively charged core of an atom, containing protons and neutrons.
- 5. a push or a pull on one object by another object that is touching it.
- 7. the force that pushes perpendicular to the object’s surface.
- 10. the number of times the pattern repeats in a given amount of time.
- 11. a force that one object applies to another object without touching it.
- 12. electromagnetic radiation that you can see.
- 13. the unique ID for an element, defined as the number of protons in its atom's nucleus.
- 15. the passage of a wave through a medium.
- 16. the speed and the direction of a moving object.
- 19. a measure of the change in velocity during a period of time.
- 20. a device that uses a magnetic field to transfer mechanical energy to electric energy.
- 21. the bouncing of a wave off a surface.
- 26. law that states that the acceleration of an object is equal to the net force exerted on the object divided by the object’s mass.
- 27. a push or a pull on an object.
- 30. the displacement of spectral lines toward longer wavelengths (the red end of the spectrum) in radiation from distant galaxies and celestial objects.
- 35. the transfer of energy from a wave to the medium through which it travels.
- 36. the maximum extent of the repeating quantity from equilibrium.
- 38. the distance between one point on a wave and the nearest point just like it.