Planet Earth Vocabulary

2. An imaginary semicircle, drawn around the Earth from the North Pole to the South Pole that represents a constant longitude.
3. A line connecting places of the same temperature within a temperature field or on a weather map.
4. The nearly spherical shape of the Earth.
5. The gently sloping region at the edge of a continent that extends from the shore toward the ocean basin.
6. A line connecting points of the same value within a field.
8. The difference in height between two adjacent contour lines.
12. The angular distance in degrees east or west of the prime meridian.
15. The shell of gases that surrounds the Earth.
16. The liquid water part of the Earth including the oceans, lakes, streams, and groundwater.
17. The solid portion of the Earth below the atmosphere and hydrosphere.
19. The angular distance in degrees north or south of the equator.

1. The transition zone made up of the continental shelf and the continental slope.
7. The time when the Sun is at its highest point in the sky.
9. The science of locating your position on the Earth.
10. The region at the edge of the continental shelf towards the ocean basin.
11. The shape of the land surface.
13. The height, measured in degrees, of an object above the horizon of an observer.
14. The lowest layer of air.
18. An imaginary line that circles the Earth halfway between the North and South Poles.