Earths history

2. Break in the earths crust where blocks of crust shift past one another
3. Formed from solidified molten rocks
5. Each era is subdivided into a number
6. Occurs when rock layers bend and buckle from earths internal forces
7. Geologic change is gradual
9. When a dead plant or animal decays, a visible carbon layer is left behind
10. The summary of earths history, divided into intervals of time
13. Younger rock lies above older rock in an undisturbed sequence
14. The period of the Cenozoic
15. Age of an object compared to another
17. The process in which minerals pass through and replace the organisms cells with minerals which produces a stone-likeness to the object
18. Different levels at which an objects are at
19. Preserved evidence of animal activity or movement
21. Igneous rock from the earths interior that squeezes into existing rock and cools
23. Eons divided
24. The rate of change or breakdown of elements
26. Formed when combinations of rock fragments and chemicals are composed in layers and hardens
27. A visible shape that was left after an animal or plant was buried in sediment and then decayed away

1. Formed when other rocks are changed by heat, pressure, and chemical reactions within the earth
2. A trace or the remains of a once-living thing from the past
4. Layers altered by a process like erosion which shows sbiggersigns of rock layers being changed before new rock layer formed over top
8. Fossils that are the actual bodies or body parts of organisms
11. Shows the layers of snow and ice that have built up over the years
12. The largest unit of time
16. Exact age of an object or how long ago an event occurred
19. Occurs when earths forces move rock layers until they become slanted
20. Special fossil, and only existed during a specific time spams
22. A tool for studying the past and helps scientists develop accurate history of overall weather patterns over time
25. An object that is created when sediment fills a mold and becomes rock