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1. in studying earth history, geologists rely on the idea that ( 1 point )

a. fossils are the only way to know exactly what life existed and when.
b. geologic processes happening today on earth also operated in the past.
c. we will never know for sure what happened 4 billion years ago because we weren't there to witness it.

2. what process is used to match rocks of similar ages in different regions?

a. correlation
b. indexing
c. superposition

3. which of the following could not be preserved in the rock record?

a. a lunar eclipse
b. volcanic eruption
c. meteorite impact

4. in this process, rocks are put into proper sequence or order chronologically.

a. absolute dating
b. carbon-14 dating
c. relative dating

8. what are the best conditions for fossils to form?

a. rapid burial and soft parts
b. rapid burial and hard parts
c. slow burial and soft parts

9. fossils typically form in these types of rocks, usually at the bottom of an ocean or lake

a. sedimentary rock
b. metamorphic rock
c. volcanic rock

10. the geologic time scale is divided into intervals based on significant and events in earth's past.

a. evolutionary and astronomical
b. factual and fictional
c. geologic and evolutionary

11. this type of fossil reflects only the shape of an organism. it leaves an indentation in the rock when the organism dissolves.

a. mold
b. trace fossil
c. preserved remains

12. this type of fossil includes all or part of an organism with relatively little change

a. mold
b. trace fossil
c. preserved remains

13. this type of fossil provides indirect evidence of an animal like a footprint or burrow.

a. mold
b. trace fossil
c. preserved remains

we lump the first three eons together and call it time because there is not much rock or fossil evidence around from this time.

a. paleozoic
b. precambrian
c. cenozoic

15. during this era, reptiles dominated the landscape.

a. cenozoic
b. mesozoic
c. paleozoic

16. this is the era of "recent" life. mammals are the dominant organism and it is divided into the tertiary and quaternary period.

a. cenozoic
b. mesozoic
c. paleozoic

17. this was the era of "ancient" life and was divided into six periods.

a. cenozoic
b. mesozoic
c. paleozoic

( essays )

describe what happened at the end of the mesozoic era. what happened to plants and animals because of this event? make sure to include the steps leading up to this. ( 4 points )

explain what adaptations and environmental conditions made mammals better suited for survival in the cenozoic era. ( 3 points )