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ashley science 1
all of my chapter " clues to earths past" things to know for the test
| Question | Answer |
|---|---|
| who is a person who studys fossils | a palentolojest |
| remains, imprints, or traces of prehistoric pasts are_________. | fossils |
| fossils can form if the organism is quickly_______ by sediments. | burried |
| organisms with______ parts are more likely to become fossils. | hard parts |
| types of | preservation |
| fossils in which the spaces indide are filled with minerals from groundwater are called___ | premineralized |
| carbon film results when ___________ then ____ becomes coal | a thin film or carbon residue forms a silhouette of the original organizum; carbonized plant material becomes coal |
| mold- ____ in rock left when ___ parts of an organisum decay | 1. cavity 2. hard |
| if ___ washes into a mold if can form a ___ | 1. sediment 2. cast |
| ______ remains are preserved in material such as ________, ________, or tar. | 1. origianial 2.ice 3. amber |
| ________ is an example of an organizums activities. | trace fossils |
| examples of trace fossils would be | foot prints from an animal or something or a burrow like from a worm |
| index fossils are_______ | abundent, geographical widespread organizums that existed for relatively short periods of time |
| fossils can reviel information about past land forms and ______ | climates |
| principles of _____________ - process of reading undisterbed rock layers | super possition |
| _______ rocks that are on bottom layer | oldest |
| _______ rocks are on the top layers | youngest |
| how old something is in comparison to something else | relative ages |
| the age of ________ rock can be ditermined by examining layer sequences. | undesterbed |
| the age of _______ rocks can be ditermined by fossils or other clues. | disterbed |
| ________- are gaps in rock layers | unconformities |
| _____________ unconformities - rock layers are titles, and younger sediment layers are deposited horizontily ontop of the eroded and tilted rock layers. | angular |
| a layer of horizontial rock once exposed and eroded befor younger rock formed over it is ____ | disconformity |
| _______ conformity is sedimntary rock forms over eroded metamorphic or igneous rock | non conformity |
| the same rock but in differant locations, fossils can be used to ________ those rock layers | corolate |
| beta decay is | an isotope break down into a proton and electron with the electron leaving the atom as a beta partical ; a new proton is formed due to proton gain. |
| sn isotype gives off two protons and 2 neutrons as an alpha partical; a new eliment forms | alpha decay |
| patasslumarogon | dating is used to date the ancient rocks millions of years old. |
| carbon 14 | dating is used to date bones, wood, and charcoal up to 75,000 years old |
| the oldest known rocks are about | 75,000 years old |
| earths estimate is to be about ___ years old | 4.5 billion years old |
| uniformitarianism | earths processes occuring today are similar to those that occured in the past. |
Created by:
junebug1217
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