Social Studies Crossword Puzzle

2. A large expanse of fairly flat dry land, usually with few trees
3. An axis is an invisible line about which an object rotates, or spins
4. A natural stream of water that flows through land and empties into a body of water such as an ocean or lake
5. An area of land, smaller than a continent that is completely surrounded by water
8. A book of maps or chart
10. A narrow body of water that joins two larger bodies of water
13. A narrow strip of land that joins two larger areas of land
14. The angular distance of a place east or west of the meridian at Greenwich
16. A forcible overthrow of a government or social order for a new system
17. The beginning or place of origin of a stream or river
18. An area of land, usually fairly large, that is always wet and is overgrown with various shrubs and trees

1. A deep narrow valley with steep sides, often with a stream running through it
3. An area of sea with many islands
6. The angular distance of a place north or south of the earth's equator, usually expressed in degrees and minutes
7. A circle of constant longitude passing through a given place on the earth's surface and the terrestrial poles
9. A stream, river, or glacier that joins a larger stream, river, or glacier, or a lake
11. all the plants of plant life of a place, taken as whole
12. An artificial waterway constructed for use by shipping, for irrigation, or for recreational use
15. Either of the two points in the ecliptic farthest from the equator
19. A relatively flat elevated area with steep sides that is less extensive than a plateau