Words of the Week #17 and #18

Front

flat-topped hills with steep sides or columns of rock

Back

butte

Front

triangular deposit of sand and soil at the end of a river

Back

delta

Front

a dry region with little or no rainfall

Back

desert

Front

a mound or ridge of windblown sand

Back

dune

Front

Part of the river that empties into another body of water

Back

mouth

Front

place in the desert where there is a source of water and where plants grow

Back

oasis

Front

Two rivers supplying water into one river

Back

river system

Front

a vast, large region covered by sand

Back

sand sea

Front

place where the river begins

Back

source

Front

smaller stream or river that flows into a larger one

Back

tributary