Exploring the United States

3. deep, narrow valley with steep sides
8. area of high, flat land
9. set of lines that run east and west drawn on maps and globes-- are measured in degrees north and south from equator
11. kind of weather a place has most often, year after year
13. low, bowl-shaped land with higher ground all around it
15. place where a river empties into a larger body of water
18. something that cannot be made again by nature or by people
20. set of lines that run north and south, from the North Pole to the South Pole, drawn on maps and globes-- are measured in degrees east and west from the prime meridian
22. Imaginary line that divides Earth into the Northern Hemisphere and Southern Hemisphere
23. line that shows the end of a place
24. graph that uses a line to show changes over time
25. river or stream that flows into a larger river
27. water that sinks beneath Earth's surface when it rains or snows
29. something found in nature, such as water, soil, or minerals, that people can use to meet their needs
30. differences in the heights of land shown in maps
31. one of the shapes that makes up Earth surface, such as mountains, hills, valleys, or plains
32. exact position of a place on Earth, using lines of latitude and longitude

1. Where a place is in relation to one or more other places on Earth
2. protection and wise use of natural resources
4. height of the land above sea level
5. natural substance found in rocks
6. place where a river begins
7. water that falls to Earth's surface as rain, sleet, hail, or snow
10. One of the 7 largest land areas on Earth
12. An imaginary line that is often used to divide Earth into the Western Hemisphere and the Eastern Hemisphere
14. amount of moisture in the air
16. measurement of hot and cold
17. surroundings in which people, plants, and animals live
19. all the businesses that make one kind of product or provide one kind of service
21. Half of Earth
26. something that can be made again by nature or people
28. part of an ocean or sea extending into the land