Across
- 2. what is the science of the origin and development of the universe in astronomy
- 3. what is the physical interaction among electric charges, magnetic moments, and the electromagnetic field
- 4. a region of spacetime where gravity is so strong that nothing can escape
- 5. what is the displacement of the spectrum to shorter wavelengths in the light
- 7. what is the twin of almost all the subatomic particles
- 9. what is a theory of exponential expansion of space in the early universe
- 13. instruments that measure electromagnetic radiation, from ultraviolet to infrared, including the visible spectrum
- 15. what do scientists use to explain the way the universe began
- 16. the SI base unit of thermodynamic temperature
Down
- 1. the cooled remnant of the first light that could ever travel freely throughout the Universe
- 6. a change in observed wavelength, or frequency
- 8. the study of the relations between heat, work, temperature, and energy
- 10. what is complete empty space
- 11. physical quantity that expresses quantitatively the perceptions of hotness and coldness
- 12. the distance light travels in a year
- 14. change, or the interval over which change occurs