older v. younger- sequential order- The technique of establishing a

chronology of events arranged in relative sequential order.

Events not a specific time only before or after other events

how much time has passed- ( how long ago it happened) specific ages-the technique of establishing when events occurred according to how much time has elapsed since their occurrence.

What age dating is Nicholas Steno’s principles of superposition, original horizontality, and lateral continuity Charles Lyell’s principles of cross-cutting relationships and included fragments William Smith’s principle of biotic succession.

What age dating has these ways to tell -tree rings and coral growth lines counting layers of ice drilled from glaciers, counting sediment layers in ancient lakes, radiometric age dating

the first astronomical model – the Earth is the fixed center of the universe and everything revolves around it- Ptolemy is the person

Sun is the fixed center of the universe and the earth and other planets revolve around it – Galileo worked on this

chronology or calendar of the Earth’s history

the study of layers in sediments and sedimentary rocks

                — matching layers from one area to another area

Fossils

chemical isotopes- ratios of chemical isotopes

rock type and composition

changes in sea level

A Change in the number of isotopes-positive or negative shift in the isotopic ratio of an element recorded through a succession of strati-graphic layers.

it has a distinct top and bottom, and is mappable across geographic space.

The amount of time it takes for a quantity of a substance to reduce half it's inital value-radioactive parent isotope to transform, or decay, to a daughter product.

in a radioactive decay series. An unstable isotope that decays, or transforms, into a daughter product (isotope)

A stable isotope formed from the radioactive decay of a parent isotope

refers to numerical age

How old is the Earth based on Young Earth Theory- Bible theories of Lightfoot and Ussher

How old is earth based on Old earth theory- from geology

How old is the universe?

What are the 2 types of Age Dating

Sequence of normal and reverse polarity episodes

Isotopes- radiometric Age Dating

3 types of Isotope decay