| A | B |
|---|
| ice age | time when the climate was so cold that much of the Earth's surface was covered with ice |
| glaciers | huge sheets of ice |
| hunters and gatherers | people who hunt animals and gather wild plants, seeds, fruits, and nuts to survive |
| history | past events that are preserved in written records |
| prehistory | the time before written records |
| artifacts | objects made by people in the past |
| marsh | an area of low wetland that is covered mostly with tall glasses |
| civilization | a culture that has developed systems of government, education, and religion |
| empire | a large area containing different people who are all ruled by a country or a single ruler |
| religion | the way people worship |
| Aztecs | Ancient civilization (1200-1521 AD) that was located in what is present-day Mexico City |
| tribute | payment in the form of goods and services |
| Karankawa | Gulf Coast, hunters and gatherers |
| Comanche | lived in South Plains; fierce fighters; learned to ride horses and hunted buffalo |
| cradleboard | wooden frames to keep babies safe |
| Jumano | Native Americans who live in the far western part of Texas, which is mostly desert |
| pueblo | Spanish word for village |
| adobe | brick made from mud or clay and straw that has been dried in the sun |
| trotline | lone, heavy fishing line that stretches across a stream with baited hooks |
| crop rotation | planting a different crop each year in the same soil |
| Caddo | Eastern Texas and parts of Arkansas and Louisiana; farmers; hunted buffalo, permanent homes of wood frames and mud walls |
