0
Why can't carbon 14 be used to date material that is older than 75000 years?
Wiki User
∙ 8y ago
The half-life of carbon is roughly 6000 years. That means that every 6000 years, the amount of Carbon halves. Therefore, in a million years, the amount of carbon-14 would be so low that it would be extremely difficult to determine the exact age of the shell. So radioactive elements of longer half-lives, such as Uranium-238(half-life of 4.9 billion years) are used to date older objects.
Wiki User
∙ 12y ago
Wiki User
∙ 10y agoSuch fossil bones are so old that C-14 has decayed to such low levels as to be undetectable. However other radioisotopes can be used for dating.
Wiki User
∙ 8y agoCarbon-14 has a half life of 5700 years so, after 75000 years there is only about 0.01% of the original amount left. Furthermore, carbon-14 is present inly in organic remains.
Add your answer:
Earn +20 pts
Which items can be dated by isotope carbon 14?
material up to 60 000 years old
What is the half life of carbon-14 and what does this refer to?
The half-life of carbon-14 is about 5700 years. Some sources say 5730, but I don't know the accuracy of that number. In the case of carbon-14, this is the period of time for half the original material to decay to nitrogen-14. This is useful in carbon dating, where the ratio of carbon-14 to carbon-12 and carbon-13 is measured, giving an estimate for the age of a carboniferous (plant material) sample.
Why is potassium-40 used to date objects older than 50000 years old?
Anything older than 50,000 years must be dated on the bassi of a radioactive isotop that has a half-life longer than that of carbon-14. One such isotope is Potassium-40.
How is the amount of carbon-14 in an artifact related to its age?
The level of carbon 14 in an artefact reduces by 50% every 5730 years from the moment that the raw material from which the artefact is made no longer is exchanging carbon with he atmosphere, in most cases this is the point of death of the animal or plant.
How are bacteria involved in the formation of coal?
Bacterial growth within the plant material causes a gradual breakdown of molecules in the plant tissue, leaving carbon and some impurities behind. This material that eventually will become coal after millions of years.
Why cant carbon-14 be used to date material that is older than 75000 years?
Carbon has a half life of 5730 years. That means that after 5730 years there'll only be half the amount left. After about 11500 there will be a quarter of the original. After 75000 years there will be about 0.0001 of the original sample which is too small to date accurately?
Which isotope is useful for dating wood and charcoal that is less than 75000 years old?
carbon- 14
Which isotope is useful for dating wood and charcoal that is less than about 75000 years old?
Carbon-14 is the isotope commonly used for dating wood and charcoal less than about 75,000 years old. This isotope is useful because plants take in carbon-14 while they are alive, and it decays at a known rate after the plant dies, allowing for accurate dating.
What is the age determined by carbon dating?
The age of organic material up to about 70,000 years.
Can carbon dating be used on bones a million years old?
No, there are no detectable levels of carbon-14 left in any sample older than roughly 40,000 years. Without carbon-14 in the sample, no date can be determined.
Which items can be dated by isotope carbon 14?
material up to 60 000 years old
Which prophet of Allah was present 75000 years ago?
There is no way of knowing the answer to your question
Why can't carbon be used to date all ages of material?
Carbon dating is only reliable up to about 50,000 years due to the short half-life of carbon-14 (5,730 years). For older materials, other radioactive isotopes with longer half-lives, such as uranium-lead or potassium-argon, are used for dating.
What is payment on 75000 loan at6.25percent for 30 loan?
$453.42 over 30 years.
Is radioactive dating important for providing evidence for evolution?
It tells you when the animal that made a fossil was alive. Radio carbon dating proves scientifically the age of a given material. If a fossil is found embedded in material that is x number of years old and a similar fossil is found x number of years older or younger then we can surmise the evolution of that species. There are thousands of examples of theoretical evolution using this method.
How is radioactivity dating important for providing evidence for evolution?
It tells you when the animal that made a fossil was alive. Radio carbon dating proves scientifically the age of a given material. If a fossil is found embedded in material that is x number of years old and a similar fossil is found x number of years older or younger then we can surmise the evolution of that species. There are thousands of examples of theoretical evolution using this method.
What is the half life of carbon-14 and what does this refer to?
The half-life of carbon-14 is about 5700 years. Some sources say 5730, but I don't know the accuracy of that number. In the case of carbon-14, this is the period of time for half the original material to decay to nitrogen-14. This is useful in carbon dating, where the ratio of carbon-14 to carbon-12 and carbon-13 is measured, giving an estimate for the age of a carboniferous (plant material) sample.
