STEM - the crossword

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Across
  1. 4. A structured collection of data stored in a computer system
  2. 5. The abbreviation of a term describing paid advertising on search engines.
  3. 8. The STEM career in which a study of animals is done.
  4. 10. The study of the nature of objects and phenomena in space.
  5. 11. A unicellular organism that moves using protoplasm.
  6. 12. The process of posting social media content on a web page.
Down
  1. 1. The introduction of new ideas or products.
  2. 2. Carefully watching and recording events or phenomena.
  3. 3. Polynomial of degree 4
  4. 6. A tube-shaped organ opening into the lower end of the large intestine.
  5. 7. A general fact or rule expressed in symbols and signs in both science and mathematics.
  6. 9. A straight line touching a curve at a point, but not intersecting