Science Potpourri

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Across
  1. 3. Atoms that have gained extra electrons
  2. 4. The resistance one object gets while going over another
  3. 6. The minimum amount of any physical entity involved in an interaction
  4. 7. Transition of matter from solid to gas phase directly
  5. 8. Resistance to a particular infection or toxin
  6. 9. A short branched extension of a nerve cell
  7. 11. Remains or impression of a prehistoric organism
Down
  1. 1. Converts pressure or brightness into an electrical signal or vice versa
  2. 2. Object that stores the memory address of a value located in computer memory
  3. 3. Electronic device that can increase the power of a signal
  4. 5. The branch of classical mechanics that is concerned with the relationship between motion and its causes
  5. 10. the order of operations to solve an expression