Vocabulary

3. is the periodic rise and fall of the sea level.
5. generally refers to a real or imaginary central line.
8. is an imaginary one that wraps around the Earth.
9. is one of the four fundamental forces of nature.
10. is the astronomical model in which the earth and planets revolve around the sun.
12. refers to orbital motion of a celestial object.
14. a measure of how material an object contains.
16. is a large self-luminous celestial body of plasma.
17. means that earth Centred.
19. refers to the highest point or peak of something.

1. zone Is a geographic region that observes a uniform.
2. a measure of the force gravity.
4. tilt is the angle between a planets rotational axis and the line perpendicular to its orbital plane.
6. meridian is the imaginary line of 0.
7. is a geographic coordinate that specifies the north and south position.
8. is an astronomical when one celestial body such as a moon.
11. refers to the circular motion of an celestial object.
13. is the regular repeating path.
15. is a Geographic Coordination that specifies the East and west.
18. a compass for directions.