One word for given sentences.

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Across
  1. 3. a person who is studying or has expert knowledge of one or more of the natural or physical sciences.
  2. 4. the systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.
  3. 7. an eager wish to know or learn about something.
  4. 8. a person or animal with whom one spends a lot of time or with whom one travels.
  5. 10. a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
  6. 11. the quality of being determined; firmness of purpose.
  7. 12. a label attached to someone or something for the purpose of identification or to give other information.
  8. 14. the scientific study of the behaviour, structure, physiology, classification, and distribution of animals.
  9. 15. a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth.
  10. 16. a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained
Down
  1. 1. a person who argues about a subject, especially in a formal manner.
  2. 2. move from one region or habitat to another according to the seasons.
  3. 5. the substance in the nucleus of a cell that controls heredity.
  4. 6. a newspaper or magazine that deals with a particular subject or professional activity.
  5. 7. spirit a combative, fighting attitude or temperament.
  6. 9. too long, slow, or dull; tiresome or monotonous.
  7. 10. the branch of zoology concerned with the study of insects
  8. 11. the action or process of discovering or being discovered.
  9. 13. any of various chemicals in the body that are carried by the blood and that influence the body’s growth and how it works