Puzzle

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Across
  1. 3. Organ that regulates chemical levels in blood
  2. 5. blending atomic orbitals
  3. 9. Concerned with beauty
  4. 10. Passionate, driven
  5. 11. State with no change in motion
Down
  1. 1. non-invertible matrix
  2. 2. Body's main source of energy
  3. 4. Shy, quiet
  4. 6. Change in momentum
  5. 7. A rectangular array of numbers
  6. 8. An accent or dialect