Earths History

4. Different levels at which an objects are at
5. The period of the Cenozoic
9. Geologic change is gradual
11. Formed from solidified molten rocks
12. The summary of earths history, divided into intervals of time
14. Formed when combinations of rock fragments and chemicals are composed in layers and hardens
15. Occurs when earths forces move rock layers until they become slanted
18. Eons divided
19. Exact age of an object or how long ago an event occurred
20. The process in which minerals pass through and replace the organisms cells with minerals which produces a stone-likeness to the object
21. Age of an object compared to another
26. Layers altered by a process like erosion which shows sbiggersigns of rock layers being changed before new rock layer formed over top
28. Break in the earths crust where blocks of crust shift past one another
29. The rate of change or breakdown of elements

1. Formed when other rocks are changed by heat, pressure, and chemical reactions within the earth
2. An object that is created when sediment fills a mold and becomes rock
3. Each era is subdivided into a number
6. Occurs when rock layers bend and buckle from earths internal forces
7. The largest unit of time
8. Shows the layers of snow and ice that have built up over the years
10. Fossils that are the actual bodies or body parts of organisms
13. rings A tool for studying the past and helps scientists develop accurate history of overall weather patterns over time
14. Younger rock lies above older rock in an undisturbed sequence
16. Preserved evidence of animal activity or movement
17. When a dead plant or animal decays, a visible carbon layer is left behind
22. Special fossil, and only existed during a specific time spams
23. Igneous rock from the earths interior that squeezes into existing rock and cools
24. The ring inside a tree trunk
25. A visible shape that was left after an animal or plant was buried in sediment and then decayed away
27. A trace or the remains of a once-living thing from the past