Across
- 1. "Wearing goggles in a lab is one of the necessary safety _____ required for scientists."
- 3. a synonym of mostly
- 4. the verb of extinction
- 5. before a species dies out or becomes extinct, it becomes _____
- 8. causing disagreement
- 13. set free
- 15. "I listen to music to _____ stress."
- 18. artists display their work here
- 19. great physical and mental suffering
- 20. "I feel _____ when studying last night. The loud noise from the neighbor was distracting."
- 21. "The books I bought last month are just sitting on the shelf and _____-_____."
Down
- 2. unfairly using animals for human's advantage
- 6. work together = work _____
- 7. "High property prices is one of the effects of heavy _____ in previously rural areas."
- 9. the ideas that repeat in a novel, movie, or game
- 10. set free
- 11. keep animals in order to produce young ones
- 12. a synonym of starvation
- 14. the smoke from factories are a kind of _____-_____
- 16. "One of the _____ barriers I experienced when I moved to this country was the language spoken here."
- 17. manufacturing in large quantities