Across
- 4. A possible explanation that is based on facts.
- 8. The study of the universe beyond Earth.
- 10. A hypothesis or set of hypotheses supported by results of experimentation and observation.
- 12. measures distance east and west of the prime meridian.
- 13. This sphere consists of the solid earth.
- 14. Lines that show a decrease in elevation.
- 16. This is the invisible blanket that surrounds Earth.
- 17. Imaginary lines that run E to W and are parallel to the equator.
- 19. The study of variations in atmospheric conditions that produce weather.
- 20. The relationship between distance on a map and actual distance.
Down
- 1. The study of the origin, history and structure of Earth.
- 2. Covers all of Earth's water.
- 3. The difference between two contour lines.
- 5. measures distance north and south of the equator.
- 6. Shows Earth's three dimensional surface in two dimensions.
- 7. Imaginary lines that run north to south.
- 9. Lines that connect all points of the same elevation.
- 11. The difference between the highest and lowest point.
- 12. A rule that correctly describes a natural phenomena.
- 15. The study of the seas, waves, tides, currents, and sea floor.
- 18. Any factor in an experiment that changes.