Matching Pairs Our Nation's GeographyOnline version Matching review Chapter 1 by Jeannine Gryn 1 This is the number of people in an area 2 It is where a place is compared to other places 3 This is how people change the land to improve movement of goods and people 4 This is the reason why people modified rivers and streams 5 This is how the climate of the Southwest differs from the climate of the Northeast 6 A region that has similar landform features 7 Earth's seven largest landmasses 8 This natural process has worn down the Appalachian Mountains 9 An area of flat or rolling land covered mostly by grasses 10 The surroundings in which people, plants, and animals live 11 The kind of weather a place has over a long time 12 It is an area in which many features are similar 13 This describes states next to each other 14 A group of connected mountains 15 The number of contiguous states 16 The gradual wearing away of the Earth's surface 17 This is the relationship between Earth and the sun that causes the seasons environment erosion erosion region contiguous relative location continents It is hotter and drier by digging channels the change in the Earth's tilt toward the sun mountain range landform region prairie forty-eight climate population water was used for drinking and generating electricity