| A | B |
| The place where a river begins | source |
| Any river that flows into another, larger river | tributary |
| the place where a river empties into an ocean, lake, or larger river | mouth |
| the land next to an ocean | coast |
| the part of an ocean or lake that cuts deeply into the land | bay |
| a sheltered place along the coast where boats can land | harbor |
| the condition of the air at a certain time in a certain place, including temperature, precipitaion and wind | weather |
| the pattern of weather in a certain place ofer many years | climate |
| a measurement of how hot or cold something is | temperature |
| a storm with very strong windsw and heavy rain | hurricane |
| a snowstorm with very strong winds | blizzard |
| the moisture that falls to the ground such as rain, snow, or sleet | precipitation |