3rd nine weeks exam science
Terms in this set (31)
law of cross cutting
a layer that cut into another layer which is younger than the layer it cut into.
biomass,wind ,hydro-power ,geothermal,and solar.
coal,oil,natural gas,and nuclear.
tool used to determine age or rock strata.
geologic time scale fossil record
scientists can see changes over time,that many organisms that lived in the pass dies.
law of superposition
the bottom layers are the oldest and the top layers are the youngest. ( they get younger as they go up from the bottom).
law of inclusions
the rock that is inside the other rock is older than the rock around it.
single cell,jelly fish,and bacteria.
complex life (dino),mammals (small),bird,pant,and conifer.
humans and mammals.
similar structures,not the same functions.
not similar structure,same function.
organism has a structure that is useless not needed anymore.
identify an index fossil
they are recognizable,abundant,life long,boundaries in geologic time,and determine age.
the theory of evolution by natural selection
: 1st formulated in Darwins book on the orgin of species in 1859 the process by which organisms change over time as a result of changes in hertibal physical/behavioral traits changes that allows an organism to adapt to environment ,survial of the fittest, Homologous anatomy, fossil evidence, disruption in time and space evidence by example.
what do similarities in bone structures tell us about organisms
they are common ancestors .
what do slight differences in bone structures of organisms suggest
the organism adapted to its environment.
relationships between different organisms based on "derived characters".
unique characteristics of a group of organisms.
the closer and more recent common ancestor shows evolutionary relationships among various species.
evolutionary relationships among various species (branching diagrams).
studying inherited characteristics and historical evidence we can reconstruct evolutionary relationships and represent them on a family tree
compare/ contrast embryos of different species. helps to figure out which species is which.
how can we use comparative embryology to argue the theory of evolution?
in the first stage of evolution embryos resemble a lot which argues that we evolved from a common ancestor.
An organism in the earliest stage of development
the unborn young of vertebrate anmial
the study of embryos and their development from fertilization until fetus
species changed from original to modern organisms
stored due to position; ready to be used; all objects
motion; stored= stretch