click below
click below
Normal Size Small Size show me how
Fossils
Term | Definition |
---|---|
Paleontologists | Scientists who study fossils |
Why is fossil record important? | 1. Show how life has changed over time 2. Show how Earth's surface has changed over time 3. Show what past environments were like |
Petrified | MINERALS (key word) - turned into stone - dissolved minerals, water evaporates, leave minerals behind |
Mold and Casts (one characteristic) | Mold- a hollow area in sediment Casts-is a copy of the shape of the organism |
Carbon Film | Gases escape from the sediment and leave carbon behind |
Trace | Provides evidence of ancient organisms- ex. footprints, poop |
Preserved Remains (body fossils) | Soft parts visible- ex. tar pits, amber(tree sap), and freezing |