Across
- 3. producing or transmitting light.
- 5. a clear, volatile liquid once used as an anesthetic or a highly rarefied substance once thought to fill the universe.
- 6. information or signs that indicate whether a belief or proposition is true or valid.
- 8. the intrinsic nature or indispensable quality of something that determines its character.
- 10. existing or occurring now; in a particular place.
- 11. to give support, confidence, or hope to someone.
- 14. a short, commonly known saying that expresses a general truth or piece of advice.
- 15. in a way that fails to achieve desired results or is unproductive.
- 16. a means by which something is communicated or expressed.
- 17. absolutely necessary or essential for life or success.
Down
- 1. a proposed explanation for a phenomenon, based on limited evidence as a starting point for further investigation.
- 2. to form a theory or explanation about something.
- 4. a clear expression of something in speech or writing.
- 6. a belief that certain phenomena have an inherent, unchanging essence.
- 7. a particular kind of matter with uniform properties.
- 9. up to express the most important facts or characteristics of something briefly.
- 12. used to single out one person, thing, or situation over all others.
- 13. an abstract idea or general notion.
- 14. a scientist who studies or is an expert in physics.
