Crossword puzzle

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Across
  1. 1. A straight, narrow beam of light energy traveling from a radiant source.
  2. 5. The preserved remains of an ancient living organism in rock
  3. 6. The physical property of a material that allows it to stretch under force and snap back to its original shape
  4. 8. A flexible sensory organ on the head of an insect used to detect scents, touch, etc
  5. 9. A magnetic metal used to manufacture steel, and an essential mineral in blood
  6. 10. The human body’s largest external organ, serving as a protective barrier
Down
  1. 2. The rate of change in an object’s velocity
  2. 3. Commonly described using compass points like north, south, east, or west
  3. 4. The powdery grains produced by flowers
  4. 7. The total amount of matter contained inside an object