Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Fossil |
A fossil is a thing that decayed or went down in the sand or mud and has stayed there for hundereds of years. |
|
|
|
Cast |
A cast fossil is a fossil is a mold that is filled with sand or mud and hardens into the shape of the organism |
|
|
|
Mold |
When sediments are buried the organism and sediments change into rock. |
|
|
|
Petrified/ permineralized |
When minerals soak into the buried remains, replacing the remains, and changing into rock. |
|
|
|
Preserved |
When an insect or organism gets stuck in sap and it hardens and they are stuck in it. |
|
|
|
Trace |
When any plant or organism gets stuck in mud and the mud hardens it gets peeled from it sometimes and it has the trace of the thing still on it. |
|
|
|
Relative age |
This is when you estimate the age |
|
|
|
Absolute age |
This is the exact age of something |
|
|
|
Carbonized fossil |
When organisms are squeezed into compressions |
|
|
|
Law of superposition |
This law is the guiding principle of stratigraphy, or the study of geological or soil layers.
|
|
|
|
Index fossils |
a fossil that is useful for dating and correlating the strata in which it is found.
|
|
|
|
Trilobite |
An existed anthropoid |
|
|
|
Geologic time scale |
is a system of chronological measurement that relates stratigraphy to time
|
|
|
|
Era |
a long and distinct period of history with a particular feature or characteristic. |
|
|
|
Epoch |
a period of time in history or a person's life, typically one marked by notable events or particular characteristics.
|
|
|
|
Precambrian |
precambrian Era comprises all of geologic time prior to 600 million years ago. |
|
|
|
Paleozoic |
is the earliest of three geologic eras of the Phanerozoic Eon, spanning from 541 to 252.17 million years ago.
|
|
|
|
Mesozoic |
"Middle Life" Era, giant reptiles, dinosaurs and more. The period spans from about 252 million years ago to about 66 million years ago, was also known as the age of reptiles.
|
|
|
|
Cenozoic |
"The Cenozoic period began about 65 million years ago with the extinction of the dinosaurs and continues through. The Cenozoic is divided into just two time periods now"
|
|
