enSCFossils8
Fossils : are persevere remains or traces of living things
Trace Fossils : provide evidence of the activities of ancient organisms
Carbon Film : an extremely thin layer of coating on a rock
Relative Age : a rock is its age compared to the ages of other rocks
Absolute Age : a rock is the number of years that have passed since the rock form
Index Fossil : a fossil must be widely distributed and represent an organism that existed for a geologically short period of time.
Halflife : of a radioactive element is the time it takes for half of the radioactive atoms to decay
Eras : Geologist divide the time between Precambrian Time and the present into three long units of time
Fossils
1. ALFEIHLF
of a radioactive element is the time it takes for half of the radioactive atoms to decay
2. COLAMRBNIF
an extremely thin layer of coating on a rock
3. RAGTAIEVEEL
a rock is its age compared to the ages of other rocks
4. SFOLSIS
are persevere remains or traces of living things
5. ARES
Geologist divide the time between Precambrian Time and the present into three long units of time
6. BSEEALTAUGO
a rock is the number of years that have passed since the rock form
7. FORAISSSETCL
provide evidence of the activities of ancient organisms
8. NDSOEXISFIL
a fossil must be widely distributed and represent an organism that existed for a geologically short period of time.