World Deserts

1. either of two halves of Earth
4. to send out
5. rock rock formed by magma, or melted rock, that has reached Earth's surface and cooled
8. a scientist who studies weather patters over time
12. dark gray or black volcanic rock that looks like glass
13. brush small or short bushes and trees
14. an area in the desert where there are plants and water
15. level land that is the same elevation as the surface of the sea or ocean
18. the process by which a liquid changes to a vapor or gas
21. natural or human processes that turn fertile land into a desert
23. a type of mammal that carriers its young in a pouch
24. an area far from the coast in a country of continent
25. relating to the nomadic Arab tribes of Arabia and North Africa
28. the landforms of a piece of land

2. water falling to Earth's surface as rain, hail, snow, or sleet
3. an area of land that is lower than the land around it
6. reserve an area set aside by the government where animals are protected from hunters
7. moving around often in search of food; not settled in one place
9. marsh an area of coastal wetland, directly affected by the rise and fall of the tide
10. a wide, flat area of land, often higher than surrounding land; a plateau
11. a type of plant with pointed leaves, a long stem, and white flowers that grows in dry areas
16. relating to a geographic pole or the area around it
17. a piece of land sticking out into a body of water, so that it is almost surrounded by water
19. describing locations with little precipitations, but with enough moisture to support the growth of grasses, shrubs, and a few scattered trees
20. the ground at the bottom of a river
22. flat an area of land where evaporation has left a layer of salt
26. a building from which scientists watch and study the sky
27. line a crack or split in Earth's crust along which movement takes place