Vocabulary. Group 1

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Across
  1. 3. A place of study or training in a special field.
  2. 4. Not likely to change or fail; firmly established.
  3. 6. A task or situation that tests someone’s abilities.
  4. 7. The carrying of people or things from one place to another.
  5. 9. Politely refuse (an invitation or offer).
Down
  1. 1. Of first importance; main.
  2. 2. Make (an action or process) easy or easier.
  3. 5. A thing with distinct and independent existence.
  4. 8. A group or system of interconnected people or things.
  5. 10. Reasoning conducted or assessed according to strict principles of validity. A particular system or codification of the principles of proof and inference.