unit 4 study guide Flashcards
what does it mean to use humility when we study different views Christians have about the details of how earth was formed
our understanding is limited
some things we will not see clearly until we get to heaven
what is no final conflict
when science and religion conflict either its a misunderstanding of conflict, or a mis interpretation of the scripture
how does sedimentary rock form
layers of sediment become deposited on top of one another over a long period of time
where does formation usually take place
underwater
strata
layers of sedimentary rock
2 reasons one layer of strata can be different from the next
all from different time periods
contain different fossils
where are the oldest layers
very bottom
how old are the oldest rocks
4.6 billion years ago
order of naming time periods
eons, eras, periods
what are index fossils
fossils that are unique to a specific layer. used to identify rock layer
catastrophism
major events can create strata, and other uncomformities quickly
uniformitarianism
slow buildup of sediments which became cemented together over long periods of time
proof from mt st helens of quick forming features
25 ft of strata in 3 hours
140 ft canyon formed in 1 day
what is an uncomformity
erosion within strata
what haooens when a radioactive icotope decays
gives off radiation and becomes unstable
3 types of radiation
alpha and beta decay and gamma rays
whats in an alpha particle
2 protons and neutrons
whats in a beta particle
1 electron
isotope thats used to determine the age of once living things
carbon 14
what type of rock are fossils found
sedimentary
organisms most oftewn found in fossils
hard shelled
fossilazation that includes the most details abt the organism
original preservation
conditions for fossils to occur
dief frozen or in an oxygen free environmnet
permineralzation
organism is buried and water seeps into cells and leves behind mineral
petrification
slowly decomposes and mineral rich water fills it
fossil mold
impression made by a shell or bone hardens
fossil cast
mold fills with sediment forming a replica
type of fossil that happens when leaves n stuff are put in inrtense hest
carbonizations
trace fossil
evidence of ancient plant or animal life
gastrolith
smooth stones in the stomach of a dinosaur
coprolite
fossilized feces
