Across
- 1. direction of an object appears to differ when viewed from different positions
- 5. gaps between the constituent particles
- 6. a class of variable stars whose luminosity fluctuates with an extremely regular period.
- 9. system of millions or billions of stars
- 11. branch of physics involving the study of the electromagnetic force
- 12. How hot or cold something is
- 14. rate at which the value of a currency is falling and, consequently, the general level of prices for goods and services is rising.
- 15. primary unit of temperature measurement You use this when you do build things
Down
- 2. can be described as the opposite of ordinary matter.
- 3. measure the intensity of a light with this
- 4. any decrease in an electromagnetic wave ’ s frequency
- 7. pair of equal and oppositely charged
- 8. displacement of the spectrum to shorter wavelengths in the light
- 10. you can tell this on a clock
- 13. the science of the origin and development of the universe.