4th Grade--Vocabulary 85-98

85. canyon--a valley that is deep with very steep sides 86. cave--a large hole found in rock or underground 87. delta--land made up of soil that a river has carried and left at the place where the river flows into the sea 88. dune--hill of sand piled up by the wind 89. floodplain--low, flat land along a river that may be underwater during a flood 90. glacier--a huge, slow moving mass of ice 91. hill--a place that is higher than the ground around it but smaller than a mountain 92. island--a body of land surrounded on all sides by water 93. mountain range--a group of chain of mountains 94. sinkhole--large hole in ground formed when the roof of a cavern collaspe 95. spring--fresh water found underground and flows to the surface 96. stream--a small body of running water over the earth's surface 97. valley--the low land between hills 98. volcano--a hill or mountain formed when melted rock is forced through the earth's surface