Science Choice Board

Edit Answers
1234567891011121314
Across
  1. 3. The distance from the center line (or the still position) to the top of a crest or to the bottom of a trough.
  2. 5. A penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei.
  3. 6. Wave A type of electromagnetic radiation with the longest wavelengths in the electromagnetic spectrum, typically with frequencies of 300 gigahertz and below. At 300 GHz, the corresponding wavelength is 1 mm; at 30 Hz the corresponding wavelength is 10,000 kilometers.
  4. 7. Light The portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light.
  5. 8. The oscillating, reciprocating, or other periodic motion of a rigid or elastic body or medium forced from a position or state of equilibrium.
  6. 9. (Of electromagnetic radiation) having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves. Infrared radiation has a wavelength from about 800 nm to 1 mm and is emitted particularly by heated objects.
  7. 11. The interference or bending of waves around the corners of an obstacle or through an aperture into the region of the geometrical shadow of the obstacle/aperture.
  8. 12. A repeated sound that is caused by the reflection of sound waves from a surface.
  9. 13. The number of waves that pass a fixed point in a given amount of time.
  10. 14. Electromagnetic radiations with a frequency ranging between 300 MHz to 300 GHz.
Down
  1. 1. X-rays are a form of electromagnetic radiation, similar to visible light. Unlike light, however, x-rays have higher energy and can pass through most objects, including the body. Medical x-rays are used to generate images of tissues and structures inside the body.
  2. 2. A form of electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light, but longer than X-rays.
  3. 4. The spatial period of a periodic wave—the distance over which the wave shape repeats.
  4. 6. The redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium.
  5. 10. The change in direction of a wavefront at an interface between two different media so that the wavefront returns to the medium from which it originated. Common examples include the reflection of light, sound, and water waves.