The Mesozoic era is the age of "middle life" on Earth
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When magma works its way into a rock and crystallizes, we can assume that the intrusion is younger than the rock that has been intruded.
Which eon can be divided into Cenozoic, Mesozoic and Paleozoic?
A. Phanerozoic
B. Proterozoic
C. Archean
D. Hadean
Which of the following is the divisions of the geologic time scale in correct order of decreasing lengths of time, from the longest interval to the shortest?
A. eon – era – period – epoch
B. eon – era – epoch – period
C. era – epoch – period – eon
D. era – period – epoch – eon
How is the “principle of fossil succession” used in correlating rock layers from place to place?
A. Since life forms evolve from complex to simple over time, older rock strata will have relatively complex versions of life forms than younger layers.
B. Since life forms evolve from simple to complex over time, older rock strata will have relatively complex versions of life forms than younger layers.
C. Since life forms evolve from simple to complex over time, older rock strata will have relatively simple versions of life forms than younger layers.
D. Since life forms do not change in complexity over time, all rock strata will have relatively similar versions of life forms.
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