Geologic Time Test Remediation
Complete on a separate sheet of paper. This will bring your test grade to passing.
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What is one significant event from the Paleozoic, Mesozoic, and Cenozoic Eras?
How long did the Paleozoic era last?
What was the likely cause of extinction for the Paleozoic era? The Mesozoic era?
What are index fossils and what do they allow geologists to do?
What is the significance of hard parts on an animal?
What is a half-life?
Before the Phanerozoic, what Era consists of 88 percent of Earth’s history?
During primitive Earth, the atmosphere was very different from what it is now. What
gas that is abundant today was not back then?
9. What is the law of superposition?
10. Which type of geologic event has to occur to create an angular conformity?
11. What is the task called when using fossils to match up rocks of similar ages in different
areas?
12. What do index fossils allow geologists to do?
13. What is radioactivity?
14. What is the half-life?
15. What is radiometric dating?
16. Up to how many years can radiocarbon dating be used to date and what two substances
are used?
17. What is the relationship between eons, eras, epochs, and periods?
18. What major gas was not in earth’s original atmosphere?
19. What are large core areas of Precambrian rock called?
20. What are the most common Precambrian fossils? (calcium carbonate)
21. What modern continents was Laurasia made up of? Gondwana made up of?
22. What happened to all the continents by the end of the Paleozoic?
23. What is the significance of hard parts on animals?
24. Which period is known as the “age of fishes”?
25. Why did amphibians diversify so rapidly in the late Paleozoic?
26. During which era did the supercontinent Pangaea begin to break up?
27. How did the Rocky Mountains form? (it’s in your notes)
28. Life was restricted to what environment during the early Paleozoic?
29. What dominated the Mesozoic era?
30. What is the significance of Archaeopteryx?
31. What most likely killed the dinosaurs?
32. What are the 2 main periods of the Cenozoic and how many years do each encompass?
33. How are mammals different than reptiles? (List 3)