dating of the earth, absolute dating, relative dating, extrusions and intrusions,rock "stories", correlation of rock units, landscape regions:plains, plateaus, mountains and erosional mountains
A
B
dating of earth materials
determining the age of earth materials and events
absolute dating
finding the actual age of materials and events; number of years
relative dating
comparing the times at which events occured; earlier or later; time sequencing
radioactive decay
certain materials(radioactive isotopes) that give off particles at a steady rate
half life
amount of time for half of the radioactive materials to decay(change into another element)
