Animals Unit 1 lesson 5

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Across
  1. 2. to allow someone or something to leave a place
  2. 6. a group of plants or animals which are the same in some way
  3. 7. to show or explain the differences between two people or situations
  4. 9. because of; as a result of
  5. 10. most serious or important
  6. 12. to work together for a particular purpose
  7. 13. to stay alive
Down
  1. 1. plants or animals that may disappear soon
  2. 3. happening often or existing in large numbers
  3. 4. to damage something very badly
  4. 5. causing death
  5. 7. a man-made or natural solid, liquid or gas
  6. 8. to connect or join one thing to another
  7. 11. to make the air, water or land dirty and unhealthy