Across
- 3. a particle without an electrical charge
- 4. an area protected against intruder
- 5. instrument that measures temperature
- 6. break or burst open
- 7. arranged in the order of time
- 11. relating to an orbit or orbits
- 12. produced by the internal heat of earth
- 15. produced by the sea
- 16. a part pf something abstract
- 17. a quadrilateral with one pair of parallel lines
- 19. branch of biology that deals with living organisms
- 20. 8 legged marine animal
Down
- 1. attribute to some force beyond the laws of nature
- 2. restrict vibrations of partially to one directions
- 8. abnormally high blood presure
- 9. not causing abrasion
- 10. treatment using ultrasound shock waves
- 13. 2 wheeled vehicle, usually powered by pedaling
- 14. to catch fire
- 18. glass tank that holds marine life