| A | B |
|---|
| landscape | A large area of land, or scenery, that can be seen from one place. |
| landform | A part of the earth’s surface that has a unique shape, is easy to |
| cataclysmic event | An event that causes sudden and dramatic changes to the |
| geology | The science that involves the study of the earth, including its history |
| geologist | A scientist that studies geology, or the earth, its history and the |
| fossil | A rock whose shape reveals information about an ancient plant, animal, |
| ammonite | A kind of snail that lived in the ocean millions of years ago. |
| 3 natural resources used to produce electricity | coal, oil, natural gas |
| sediment | pieces if earth in the form of rocks, pebbles or sand |
| weathering | the process for breaking rocks and sediment into smaller pieces |
| erosion | the gradual movement of sediment from one place to another |
| deposition | the gradual build up of eroded sediment |
| gravity | the force that attracts all objects toward the center of the earth |
| source | where a river begins, which can be snow on a mountain or a spring |
| riverbanks | sides of a river |
| mouth of a river | point where a river reaches another body of water such |
| delta | is a landform at the mouth of a river made by the sand, silt, soil and |
| headwaters | (also called the source), often located in mountains, fed by an |
| gravity's effect on rivers | causes rivers to flow downhill |
| floodplain | a flat area of land stretching out on either side of a river |
| riverbed | the bottom of a river |
