PHENOMENA
This is used to figure out answers to the lesson question
What is evidence
the average period of time it takes for half of the atoms in a radioactive sample to change into new atoms
What is half life
This type of organism is found in amber
What is an insect
The formation of soil layers is the result of _____
What is sedimentation
the process of putting things in order
What is sequencing
observed to exist or happen
What is a fact or situation
a method used to date rocks and other objects based on the known decay rate of radioactive isotopes
What is radioactive dating
result of a frozen fossil thawing out
What is destruction
in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom
What is the Law of Superposition
an organism is dried out and preserved
What is mummification
this is in question or is unknown
what is cause or explanation
an unstable atomic nucleus loses energy by releasing ______________
What is radiation
a prehistoric organism preserved in petrified form
What is a fossil
comes from the decomposition of plants and animals
What is sediment
comparing fossils with present-day organisms
What is change
It is not a phenomemon:
tornado space shuttle
northern lights lightning
What is space shuttle
used to estimate the age of a fossil found in a rock layer.
What is the radioactive element's rate of decay
most fossils are found here
What is sedimentary rocks
soil particles are compacted to form ____________
What is a soil layer
the result of the decomposition of dead plant and animal matter
What is sediment
a representation of what you figured out
What is a drawing or graph
Radioactive elements are always trying to move to this
What is a more stable state
the conversion of an organic substance into a carbon-containing residue
What is carbonization
rock layers can tell us the age of a fossil through __________
What is radioactive dating
the number of half-lives that pass from 80 years to 5 years
What is 4 half-lives