| A | B |
| ground water | water found beneath Earth's surface |
| frozen | most of Earth's fresh water is ____. |
| archipelago | a group of islands |
| delta | a soil deposit at a river's mouth, usually triangle-shaped |
| gulf | a large area of ocean partly surrounded by land |
| isthmus | a narrow strip of land connecting two larger land areas |
| peninsula | land surrounded by water on three sides |
| plateau | an area of high, flat land |
| strait | a narrow body of water between two larger bodies of water |
| tributary | a river or stream that flows into a larger river |
| the seven continents | Europe, Antarctica, Asia, Africa, Australia, North America, South America |
| landforms | features formed by physical forces |
| islands | oceanic landforms that are pushed up above the water |
| the five oceans | Arctic, Pacific, Atlantic, Indian, Southern |
| salt water | about 97% of earth's water is ___ |
| glacier | slow moving mass of ice that causes erosion |
| elevation | height above sea level |
| Ring of Fire | zone of volcanoes around Pacific Ocean |