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Across
  1. 1. - Basic unit of life
  2. 4. - Basic unit of matter
  3. 5. - Capacity to do work
  4. 6. - Central part of an atom
  5. 7. - Number divisible only by 1 and itself
  6. 9. - Likelihood of an event occurring
  7. 10. - Collection, analysis, and interpretation of data
  8. 11. - Mathematical expression of a relationship
  9. 12. - Vast system of stars, gas, and dust
  10. 14. - Relationship between the sides of a right triangle
  11. 15. - Proposed explanation for a phenomenon
  12. 16. - Study of triangles and their relationships
Down
  1. 1. - Study of matter and its properties
  2. 2. - Force of attraction or repulsion between magnets
  3. 3. - Force that attracts objects to one another
  4. 5. - Subatomic particle with a negative charge
  5. 8. - Genetic material
  6. 11. - Process of gradual change in species over time
  7. 13. - Nerve cell
  8. 14. - Study of matter and energy