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To perform Uranium-235 dating on a sample, it must contain uranium-bearing minerals that have remained closed to isotopic exchange since the time of their formation. This method relies on the radioactive decay of uranium-235 to lead-207, so the sample must also be analyzed using techniques that can measure these isotopes accurately.
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What must be true for radioactive dating to be possible with a certain sample?
For radioactive dating to be possible, the sample must contain a measurable amount of a radioactive isotope with a known decay rate. The sample must be isolated from sources of contamination that could affect the accuracy of the dating. Additionally, the sample must have remained a closed system since the radioactive isotopes were incorporated, in order to accurately measure the decay products.
What two things must be true for samples to be useful?
they must be correct and they must be the right kind of sample
What measurements must you make to find the density of a sample of matters?
density = mass / volume. so you need to weigh to find the mass. To find the volume submerse in water and record the displacement of water to find the volume.
When anazlyzing a water sample for presence of an ion using precipitation reactions why should the entire sample not be used in the process explain?
Using the entire sample could lead to excessive ion precipitation, making it difficult to accurately measure the presence of the ion. It is important to use a portion of the sample to avoid overwhelming the precipitation reaction and ensure a more precise detection of the ion in question.
Who is is another variable that must be kept the same for each milk sample?
One other variable that must be kept the same for each milk sample is the temperature at which the milk samples are stored. Consistent storage temperature helps ensure that any changes in the milk samples are due to the experimental conditions and not external factors like temperature fluctuations.
What must be true for radioactive dating to be possible with a certain sample?
For radioactive dating to be possible, the sample must contain a measurable amount of a radioactive isotope with a known decay rate. The sample must be isolated from sources of contamination that could affect the accuracy of the dating. Additionally, the sample must have remained a closed system since the radioactive isotopes were incorporated, in order to accurately measure the decay products.
What do you do to perform Uranium-235 dating on a sample?
To perform Uranium-235 dating on a sample, you would measure the ratio of Uranium-235 to its decay product Lead-207 in the sample. By comparing this ratio to known rates of radioactive decay, you can determine the age of the sample. This method is commonly used for dating rocks and minerals that contain Uranium-235.
Additional information needed for carbon dating?
To perform carbon dating, we need a sample that contains organic material that was once alive, such as wood, bone, or charcoal. The sample must be carefully collected and preserved to avoid contamination. We also need to know the approximate age of the sample to determine the appropriate method and laboratory to use for analysis.
What two things must be true for a sample to be useful?
they must be correct and they must be the right kind of sample
What two features must a sample have if its to accurately represent a population?
The sample must be large and random.
In order to perform carbon 14 dating on an artifact what must be true?
The artifact must contain carbon-14.
What is a sample that that consists of everyone in the population?
It is not a sample. A sample must be a proper subset of the whole population.
When using data from population genetics research the sample must be?
The sample must have a high probability of representing the population.
What two features must a sample have to accurately represent a population?
A sample must be representative, meaning that it reflects the characteristics of the population it is drawn from. It must also be large enough to minimize sampling error and increase the likelihood of capturing the population's diversity.
Sample size must be equal for null hypothesis?
No.
A major rule in coordinating sentences is that a writer must coordinate elements that perform what?
The writer must perform an equal or similar function
How is that the random sample gives a fairly accurate representation of public opinion?
The larger the sample, the greater the accuracy, but in every case, the sample must be truly random.
