| A | B |
|---|
| Nomad | A person who travels all the time in search of food |
| Glacier | A huge sheet of moving ice |
| Civilization | The way of life of a people in one place and time |
| Empire | The territories and people under control of one ruler |
| Colony | A settlement ruled by people from another land |
| Navigator | A person who plans the direction of a ship |
| Compass | An instrument that shows direction |
| Geography | The study of climates and land forms |
| Astronomy | The study of stars and planets |
| Native American | The first people to live in the Americas |
| Maya and Aztec | Native American civilizations |
| Vinland | A Viking colony |
| Gold Coast | West Africa |
| Land bridge | The route nomads used to travel to North America |
| Columbus | A European explorer who sailed west in search of India in 1492 |
| Marco Polo | An Italian explorer who traveled to Asia in the 1200s |
| Viking | A seagoing people of Northern Europe |
| Olmecs | The first large civilization in Mexico, around 1200 BC |
| Incas | A Native American civilization that built roads thousands of miles long |
| Ice Age | A time when the Earth was covered with many glaciers |
