Unit 1 _ Reading 2 _ Vocab

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Across
  1. 1. (n)the smallest part of an animal or plant
  2. 3. (v) have or hold something within
  3. 7. (n) a scientific study
  4. 8. (v) protect
  5. 9. (v) happen
Down
  1. 1. (adj) popular
  2. 2. (v)to join or connect to something
  3. 4. (v) react by doing something
  4. 5. (v) make or create
  5. 6. (n) a set of ideas used to explain something