Dating Methods Essay

Dating Methods Essay

Length: 1443 words (4.1 double-spaced pages)

Rating: Strong Essays

Open Document

Essay Preview

General Differances Between Relative and Absolute Dating Methods


Getting dates for fossils that are found in sites being
excavated by anthropologist is very important. Dates show the
evolution from early hominid specimens to our own species, Homo
homo sapiens. There are many methods that can be used to acquire
these dates, but all of these methods fall into one of two
catorgories. They can either give a absolute date or a relative
date. An absolute date is one in which you get an actual date in
years. Also known as chronometric methods. Relative dates do
not give an actual date in terms of years, but they tell you if
one fossil is older or younger than another fossil.

Ushally relative dates are given in terms of the column of
earth they are found in. This is called striatigraphy. In
sites like Olduvai gorge their are geological layers of vocanic
ash and sediment. When a anthropologist finds a fossil in a
undistirbed layer of gray ash, you know that it is younger than
the fossil in the layer of red ash below, and that fossil is
younger than the fossil in the layer of brown ash below
it.(Johanson 65) The basic theory here is that a certian site
cantians a geolgical column key that is made up of differant
strata layers, the fossils get older as they move down the key,
and are found in differant layers of strata..(Scully 2)
Relative dates have a couple of major problems. One is that the
earth moves in many ways and this can distrube the layers of
sediment putting younger fossils below older ones. Another is
that you can not tell exactly how much younger or older something
is from somethinng else and you can not date differant fossils
from differant sites with thes relative dating methods.

Absolute dating, unlike realative dating, gives the
anthropologist an exact date in terms of calander years. These
dating methods are much more reliable and can be used in many
differant sites with many differant fossils. Absolute dating
bases it’s dates on the natural radioactivity of differant
elements found in the world.(Johnston 216) There are certian
elements that occur in differant forms, these elements are called
isotopes. Each one of these isotopes has a differant atomic mass
than others. Some of thes isotopes are radioactive, meaning that
they give of radiation in either alpha or beta form, as they
de...


... middle of paper ...


... has a half-life.

C14 is the radioactive isotope of rearular carbon, c12. The
cocentration of C14 in the body is one billionth of a gram in the
body to one gram of C12. This C14 is contantly decaying, but
through animals and plants breathing it is replenashed when an
organism is alive. When the animal dies the C14 intake stops and
a decay that is not replenashed.(Comas 456)

During life an organism have a specific activity of 15.6
disintigrations per minuate per gram of regular carbon in thier
body.(Comas 456) “After life and C14 intake cease and the
equilibrium is halted, radioactive disintigration of C14 occurs,
and after 5,700 years this activity will have decreased to 7.8
disintigratuions per minuate per gram of carbon in the
body.’(Comas 457) This means that the ratio of C14 to C12 left
in the fossil when it is found can give a date in years.

Carbon-14 dating has a half-life of 5,700 years, with the lower
limit of 1,000 years. The upper limit used to be about 30,000
years because after that the ratio was too small to analis.

Recently reaserch by Haring and deVires has let scientist put the
upper limit at 100,000 years old.(Comas 457)

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Dating Methods Essay

- General Differances Between Relative and Absolute Dating Methods Getting dates for fossils that are found in sites being excavated by anthropologist is very important. Dates show the evolution from early hominid specimens to our own species, Homo homo sapiens. There are many methods that can be used to acquire these dates, but all of these methods fall into one of two catorgories. They can either give a absolute date or a relative date. An absolute date is one in which you get an actual date in years....   [tags: essays papers]

Strong Essays
1443 words (4.1 pages)

Research on Online Dating and Relationship Essay

- Introduction Based on a research of Online Dating & Relationships, Smith and Duggan stated that the ways of finding partners have been changed with the times. In the past, people used matchmaking, arranged marriages and printed personal ads. With the rapid technology advancement, there are alternative methods - online dating sites and smart phone dating apps. To compare with the people who date traditionally, people who date online are active to choose their dream man or woman by browsing the others profiles (9)....   [tags: finding partners, traditional dating]

Strong Essays
1593 words (4.6 pages)

Essay on Meet That Someone Special With One Of The Free Online Dating Services

- The days of waiting for the special someone to come waltzing into your life have long gone. The internet has given a new outlook to dating. With the availability of free online dating services you could be talking with someone in a matter of minutes. When you date online the amount of people available for you to meet is endless. There are benefits to this form of dating, but there are also many negative aspects to be aware of before venturing out to the world of online dating. Due to the site you are considering being free to join, anyone will have access to joining....   [tags: Online Dating Services. tips, ]

Strong Essays
522 words (1.5 pages)

Traditional and Internet Dating Essay

- Traditional and Internet Dating At some point in our lives where we are searching for that special someone. The methods of going about dating have changed quite dramatically over the years. Going out has grown from traditional dating, to internet 'dating', to group dating.      Traditional Dating has changed over the years. In my generation the girls can ask the guys, there is no telling where they might go on a date, or they might just hang out at home, which did not happen as much 25 years ago....   [tags: Dating Social Values Changes Essays]

Strong Essays
692 words (2 pages)

Online Dating : Becoming Increasingly Popular And Millions Of People Around The World

- Online dating is becoming increasingly popular and millions of people around the world participate in some form of online dating. Advancements in technology have made dating as easy as swiping left or right on a user’s dating profile or sending an instant message to a stranger and setting up a date seconds later (Gardner, 2012). Even though online dating seems like an innovative and revolutionary way to meet a potential romantic partner, there is a downside to online dating. As online dating becomes more common, the obvious problem of poor communication because of online dating becomes worse and worse....   [tags: Online dating service, Dating, Online identity]

Strong Essays
853 words (2.4 pages)

Online Dating Essay

- Online Dating Some people today feel they cannot meet someone in their everyday lives so they turn to the internet to find a prospective partner, people us the internet as a way of meeting new people Online dating has become the new way of finding your soul mate The internet has made dating more convenient you no longer to have to go out to a bar and spend money trying to impress or you really don’t have, for people who are shy this is the perfect way to screen a potential in the privacy. I thought I would never talk to someone online nor consider being in a relationship statistics predict more than 100,000 marriages take place through the internet, caution is needed all websites are not saf...   [tags: profiles, internet, e-mails]

Strong Essays
865 words (2.5 pages)

Relative Dating Essay

- The Fundamental Principles of Relative DatingRelative dating involves placing events in their proper chronological sequence, that is, in the order of their occurrence (Dutch 1998). This type of dating tells us which geologic event happened first, but does not give an exact date to which something happened. There are several different methods that are used in relative dating. These are the fundamental methods that are used in the field by geologists' and earth scientists to gather information about the relative age of rock bodies and other cool geologic stuff....   [tags: essays research papers fc]

Strong Essays
702 words (2 pages)

Essay on Prevention Of Water Purification Dating

- CONTENTS INTRODUCTION………………………………………………………………… - AIM…………………………………………………………………………………….. - HYPOTHESIS……………………………………………………………………………. MATERIALS……………………………………………………………………. METHOD……………………………………………………………………….. REULTS………………………………………………………………………….. DISCUSSION…………………………………………………………………... CONCLUSION………………………………………………………………… APENDIX……………………………………………………………………….. INTRODUCTION Water is one of the most precious resources to the human race, without it survival is impossible. Civilizations all over the globe formed and flourished when an abundance of relatively clean drinking water was available....   [tags: Water purification, Drinking water, Pathogen]

Strong Essays
1027 words (2.9 pages)

The Business Cycle Dating Committee Essay

- The Business Cycle Dating Committee of the National Bureau of Economic Research (NBER) determines when the economy is in recession but a recession usually occurs when the Gross Domestic Product (GDP) drops for two consecutive quarters. (Rittenberg, Ch. 5, p. 113). There are many factors that lead to a recession. Inflation is one of the main factors that lead to a recession (Mora, n.d., para. 2). When prices increase over a long period of time it leads to inflation. The increased prices causes the consumer to spend less, businesses see profits decline and unemployment rates increase....   [tags: Monetary policy, Central bank, Inflation]

Strong Essays
869 words (2.5 pages)

Racial Relations: Dating Interratially Essay examples

- While sitting in a small circle eating lunch, my friends and I somehow got onto the topic of dating. We all confessed who may or may not have our current attention and amongst my very diverse group of friends, one of them, a Hispanic, said she was interested in dating a white male. In response, another friend asked, “you like those white boys don’t you?”. It was a simple joke as all of my friends are open into interracial dating, but there are many people in American society who do not feel the same way....   [tags: asians, blacks, hispanics ]

Strong Essays
1095 words (3.1 pages)