Term
|
Definition
| 13 billion years ago the universe began with a huge explosion that created galaxies and all matter. |
|
|
Term
|
Definition
| Scientists who study the creation of the universe and fossils |
|
|
Term
|
Definition
| impressions left in rock by organisms that were covered with sediment quickly after their death. |
|
|
Term
|
Definition
| fossils that all lived during an established time period. When scientist find these, they know the time period they are dealing with. |
|
|
Term
|
Definition
| old man made objects left behind by ancient man. |
|
|
Term
|
Definition
| Used by scientist to get a close estimate of the age of objects using the half life of isotopes found in the object. |
|
|
Term
|
Definition
| divided into 4 Eras, Precambrian, Paleozoic, Mesozoic, Cenozoic. All these periods are separarted by mass extinctions. |
|
|
Term
|
Definition
| 540 million years ago first jawerd fish, amphibians, reptiles and land plants |
|
|
Term
|
Definition
| 3.5 billion years ago earliest fossils. Stromatolites |
|
|
Term
|
Definition
| 245 million years ago. small mammals and dinosaurs, flying dinosaurs |
|
|
Term
|
Definition
| Times when almost all life on earth died out. Usually due to climate change caused by meteorites or other causes. |
|
|
Term
|
Definition
| 66 million years ago. mammals take over |
|
|
Term
|
Definition
| erronious belief that living things came from non-living things |
|
|
Term
|
Definition
| All life comes from living things |
|
|
Term
|
Definition
| very old autotrophs that live in hostile environments |
|
|
