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g8 3.2
8th grade STEMscopes CA Segment 3 Scope 2
Question | Answer |
---|---|
Chronological Order | The arrangement of things in the order that they occurred |
Diversity | The quality or state of having many different forms, types, ideas, etc. |
Extinction | The permanent disappearance of a species from Earth |
Fossil Record | The mineralized remains of organisms and the rock layers in which they are found, showing when and where long-dead organisms lived and how their bodies were structured |
Fossils | The mineralized remains of organisms, showing how long-dead organisms lived and how their bodies were structured |
Law of Superposition | Scientific law that states fossils located in deeper sediment layers are older than ones deposited in layers closer to the surface |
Petrification | The formation of fossils as stone replaces decaying tissues |
Radioactive Dating | Technique used to determine how old a rock is by analyzing the amounts of a radioactive isotope and its decay products in the rock |
Sedimentary Layers | Layers of rock that are successively deposited on top of one another and are distinguishable from one another based on their mineral contents |