someone who moves from place to place with no permanent home

sun-dried bricks made from a mixture of mud with a small amount of straw or grass

living or growing naturally in a particular place

materials or substances that occur in nature

a pattern of the combination of precipitation and temperature over time

a period of time with distinct political, economic, social characteristics

simple object (such as a tool or weapon) that was made by people in the past

an object or structure on land that is easy to see and recognize

the height of a place

a large, mostly flat area of land in North America that has few trees and is covered in grasses

a deep valley with steep rock sides and often a stream or river flowing through it

a layer of rock or sand that can absorb and hold water

a long cliff or steep slope that separates two flat or slightly sloped areas

a canal, river, etc., that is deep and wide enough for boats and ships to travel through

a small hill or pile of dirt or stones