| A | B |
|---|
| surround | to enclose on all sides/is all around something |
| pit houses | square houses that are dug into the ground |
| dwelling | residence; places where people live |
| ledge | flat areas of rock that stick out like a shelf |
| ladder | sets of steps used for climbing |
| dam | walls build across rivers to stop water from flowing |
| reservoir | bodies of water saved for use |
| chamber | a room in a house, especially a bedroom |
| drought | a time of little or no rain |
| vanish | to disappear suddenly |
| ancient | very old |
| disappeared | went out of sight |
| swirls | moves in a twisting and turning motion |
| abandon | leave something behind |
| enemies | people who wan to harm you |
| ancestors | people from whom you descend; for example, your grandparents, parents, and so on |
| high altitude | high above the ground |
| cultivate | prepare land to grow food, trees, and flowers |
| protection | something that keeps you from being hurt |
| ruins | broken parts of old buildings |
| lightbulbs | round glass parts of electric lights |
| conserved | saved |
| climate | the type of weather that a place has |
| concave | curving inward |
| migrate | move from one place to another |
| descendants | your children, grandchildren, and so forth |
| neat | slang for "great" |
| underground | located below the Earth's surface |
| physical | related to objects in the real world |
| erosion | when soil washes away or blows away because of the weather |
