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