All terms in this list:

weather: To expose to the weather, or show the effects of such exposure, or to withstand such effects.

natural resource: Any source of wealth that occurs naturally, especially minerals, fossil fuels, timber, etc.

climate: A region of the Earth.

landforms: Plural form of landform.

plain: Flat, level. [from 14th c.]

mountains: Plural form of mountain.

valley: An elongated depression between hills or mountains, often with a river flowing through it.

canyon: A valley, especially a long, narrow, steep valley, cut in rock by a river.