Across
- 1. treatment of diseases, illnesses, or problems
- 5. surrounding area
- 9. adjusting, varying, or changing
- 10. traits or special features that make a person or thing different
- 12. energy that is sent out in rays or waves by certain substances
- 13. left-over or extra
- 15. good, positive, or helpful things
- 18. very tiny pieces of matter that are smaller than atoms
- 19. a period of about 20 or 30 years. One generation is the average time from birth until a person has children
- 20. amounts someone is exposed to, or amounts that someone takes at one time
- 22. what other people think and feel about someone or something
- 24. to become different from other things of the same type
Down
- 2. a possibility or an ability to do something
- 3. to clean very well and make free of germs
- 4. causing death
- 6. the total amounts of electrical energy in things and can be positive or negative
- 7. to discover, usually something that was hidden or hard to notice
- 8. living things
- 11. brings about
- 14. left uncovered, open to danger, or unprotected against the effects of something
- 16. extremely important or necessary
- 17. photographs made using invisible rays that can travel through some solid substances
- 19. the pieces of our DNA that carry instructions for making different body parts
- 21. involving energy from the nucleus, or center, of atoms
- 23. the growth or formation of something