Across
- 1. The determination of position using radio waves.
- 4. An instrument that displays images for very brief periods.
- 7. The broad uplift or subsidence of a landmass.
- 8. A variety of garnet gemstone.
- 10. Producing the desired effect.
- 12. An instrument or device used for calibration.
- 13. A chemical species that donates an electron pair.
- 14. The scientific study of the moon.
- 15. A type of cloud characterized by white or gray patches.
Down
- 2. Extremely small; immeasurably tiny.
- 3. An instrument for measuring the curvature of spherical surfaces.
- 5. Zones of charged particles trapped by Earth's magnetic field.
- 6. A generator of electric current; a forceful, energetic person.
- 7. The use of sound waves to locate objects, as by bats.
- 9. An instrument for measuring humidity.
- 11. A chemical element.