Grade 4 Unit 4 Module 2

1234567891011121314
Across
  1. 1. System that represents letters, digits, or other characters using zeros and ones
  2. 3. An organ that interprets messages received from and sends messages to other body organs
  3. 4. A lens that is thicker in the middle
  4. 8. A "picture" of the light source that light rays make when bounced off of a shiny surface
  5. 9. The bouncing of light waves off a surface
  6. 11. A nerve that is not part of the central nervous system and receives sensory information from other parts of the body
  7. 12. The part of the nervous system made up of the brain and spinal cord
  8. 13. A thick band of nerves inside the spine
  9. 14. When an object completely blocks light from coming through
Down
  1. 2. A lens that is thinner in the middle
  2. 5. The process of finding an object by using reflected sound or echoes
  3. 6. Body parts that gather information from outside the body
  4. 7. The bending of a light wave as it changes angles passing from one substance to another
  5. 10. The set of organs that uses information from the senses to control all body systems