Geologic Time
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Law of superposition | undisturbed layers get younger as you go up
🗑
|
||||
| principle of original horizontality | all beds originally deposited in water form close to horizontally
🗑
|
||||
| principle of cross-cutting relationship | when a fault cuts through rock, the rock is younger
🗑
|
||||
| inclusions | pieces of one rock unit contained within another
🗑
|
||||
| conformable | strata sequence that is undisturbed
🗑
|
||||
| unconformities | gaps in geologic time that indicate erosion, deformation
🗑
|
||||
| disconformities | large gap in geologic time due to processes of erosion
🗑
|
||||
| angular unconformities | younger strata overlie an erosion surface on tilted or folded rock
🗑
|
||||
| nonconformities | igneous or metamorphic magma chamber intrudes, then erosion erodes
🗑
|
||||
| petrification | turn to stone (LOOKS LIKE WOOD)
🗑
|
||||
| replacement | cell membrane are removed and replaced with mineral matter
🗑
|
||||
| mold | reflects the shape and surface marking
🗑
|
||||
| cast | a mold that is filled in with mineral matter and solidified
🗑
|
||||
| carbonization | carbon film left behind after organism decay (PLANT)
🗑
|
||||
| impression | carbonization process, carbon lost and replica of surface
🗑
|
||||
| amber | resin from trees, insects are preserved (WHOLE ORGANISM)
🗑
|
||||
| tracks | animal footprints in sediment later solidified
🗑
|
||||
| coprolites | fossil poo and stomach contents that were preserved
🗑
|
||||
| gastroliths | polished stomach stones
🗑
|
||||
| burrows | tubes in sediment, wood, or rock made by an animal
🗑
|
||||
| rock and fossil correlation | matching of rock layers from one location at the same time to another location
🗑
|
||||
| principle of fossil succession | older rock contain fossils that are increasingly different from modern species
🗑
|
||||
| fossil assemblage | several different species found together in a specific rock unit
🗑
|
||||
| index fossil | well defend morphological characteristics (short-lived species and widespread distribution
🗑
|
||||
| radiometric dating | calculating the absolute ages of rock and minerals that contain radioactive isotoped
🗑
|
||||
| alpha emission | atomic #= -2
mass # -4
🗑
|
||||
| beta emission | atomic #= +1
mass # unchanged
🗑
|
||||
| electron capture | atomic # = -1
mass #= unchanged
🗑
|
||||
| half-life | time required for half of the nuclei in a sample to decay
🗑
|
||||
| radiocarbon dating | date recent events (carbon -14)
🗑
|
||||
| half life of carbon014 | 5730 yrs
🗑
|
||||
| half life of uranium-238 | 4.5billion years
🗑
|
||||
| numerical dating | actual number of yrs
🗑
|
||||
| how do geologists numerically date rocks | radioactive decay
🗑
|
||||
| relative dating | events in their proper sequence
🗑
|
||||
| biggest era | paleozoic
🗑
|
||||
| present era | cenozoic
🗑
|
||||
| present eon | phanerozoic
🗑
|
||||
| present epoch | holocene
🗑
|
||||
| present period | quaterary
🗑
|
||||
| what eon means visible life | phanerozoic
🗑
|
||||
| uniformitarianism | the physical chemical and biological laws that operate today have also operated in the geologic past (long history of earth)
🗑
|
||||
| catastrophism | earth's landscape has been developed by worldwide disasters (over a short span)(catastrophism does not require assumptions of long timelines)
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
miabegic2
Popular Geography sets