| Term | Definition |
|---|
| conglomerate | made from rocks and pebblems sediment |
| shale | made from dirt and silt sediment; black, brown, tan or reddish; flat soft layers |
| coquina | made from crumbled shells sediment (bubbles with acid) |
| sandstone | made from sand (can be any color; rough) |
| 6 forces of weathering | wind, water, ice, plants, heat and gravity |
| eroision | when sediments are moved from one place to another |
| glacier | a sheet of moving ice on land, moving slowly |
| iceberg | a piece of a glacier that has broken off into the water |
| lichen | plants that grow on rocks and trees; give off acid |
| sediment | small particles that settle in layers under water |
| 6 kinds of sediment | sand, rocks and pebbles, dirt/mud, clay, shells, decayed plants and animals |
| where does sediment come from? | sediment comes from rocks and minerals that have been weathered |
| sedimentary rocks are made from? | sediment |
| weathering | the breaking down of rocks and minerals from 6 forces |
| Steps of how sedimenyery rocks are Formed | 1) Sediment is produced by the weatheriong of rocks & minerals 2) the sediments are eroded into a swiftly flowing stream or river 3) Sed. is carried along the current until it empties into a slow moving body of water (ocean or Lake) 4) the sed. settles to the bottom of the ocean or lake in layers 5) after many layers have settled, pressure from the upper layers presses down on the lower layers & hardens them into rock 6) dissolved minerals in the water cement the particals of sediment together to finish th process. |
| Limestone | made of crushed shells ( bed rock of TN & bubbles w/acid) |
| coal | made of decayed plants & animals |
| fossil | any kind of ancient life prerserved in a rock or other substance |
| paleontologist | a scientest who studdies fossils |
| mold | a hollowed out space in the shape of a once living organisim OR when hard body parys leave a dent or depression in a sediment that has already begun to harrden. |
| cast | when minerals move into & harden inside the space left by a impression in the rock |
| intact | when an intire animal is preserved in amber, ice, or ash, or tar |
| pertified | when the hard parts of a dead orginism are changed to stone |
| step #1 | the Animal dies & falls to the body of water the soft parts are decomposed by the bactira But the hard parts remain |
| step #2 | sediments continually fall down from the water above &settle on the skeleton |
| step #3 | the sediments compact into the rock & water slowly replaces the chemicals in the bones with hard minerals |
| step #4 | water may dissolve the bones leaving a mold fossil or fills the mold with minerals forming a cast fossil |
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