Although no one can determine the EXACT date for anything prehistoric, there are still dating techniques that effectively tell the general lifespan of a given species. Although the range may vary many thousands of years in extreme cases, in comparison to the age of the world (which is about 4.5 billion years old) it is actually pretty good error range for our level of technology. The archaeopteryx is estimated to have lived about 150 million years ago, during the Jurassic period and is evidence of the first feathered prehistoric creature. The dating technique used for this was certainly not carbon-14 dating, because the half life of carbon-14 is only 5730 years, and therefore cannot be used on materials older than 70,000 years old. The method used to date the fossil of the archaeopteryx was probably radiometric dating. with this form of dating, sets of isotopes are examined such as potassium/argon, rubidium/stronium, thorium/lead, argon/argon or uranium/lead. Slight proportionate differences in the isotope levels in whichever isotope set was chosen determines the age of the object. Because the half life of each set of isotopes is so long, they can be used to date objects as old as as the earth, but cannot be used for anything more recent than .7 billion years old. First, a sample is taken from a several rocks and materials around the fossil and excavation site. After the isotope levels have been determined from the objects surrounding the fossil, it is safe to say that the fossil itself must have been approximately the age of the objects it was discovered with. Also, dating methods are tested many times and cross tested between different labs and techniques until there is a consistent result and date range given, to ensure the most accurate result possible. And as always, younger specimens will always have more accurate results than older ones.
You get an accurate answer with it rather than using semi quantitative methods to get estimated results.
Latex male condoms can be up to 99% effective at preventing pregnancy when used correctly. Check out www.plannedparenthood.org for a comprehensive look at how to use them and why they're more effective than other OTC methods.
The latitude and longitude of that point is known as the celestial body's geographic ... (Two other common methods for determining one's position using celestial ... The sextant and octant are most accurate because they measure angles.
Absolute dating methods are used to determine the actual age of a material or object in years. They are important in archaeology, anthropology, and geology to establish accurate chronologies and timelines for events. These methods include radiocarbon dating, potassium-argon dating, and luminescence dating.
The most effective ways to preserve meat for long-term storage are freezing, canning, curing, and dehydrating. These methods help prevent spoilage and extend the shelf life of the meat.
The most effective elicitation methods for gathering requirements in software development projects include interviews, surveys, workshops, and prototyping. These methods help to gather accurate and comprehensive information from stakeholders, ensuring that the software meets their needs and expectations.
Whose methods?
Withdrawal
Pulling Out
Not effective at all!
If you want the church way... ABSTINENCE! Or Natural Family planning! Otherwise condoms or the pill are pretty effective methods... Methods like pulling out aren't as effective. Be careful wit this one
Condoms
h
Douching, withdrawal and Natural family planning.
which of the following methods is effective in controlling balance of payments ?
possitive effective communication methods
Body temperature is typically measured using a thermometer. The most accurate methods for obtaining this measurement include using a digital thermometer orally, rectally, or under the armpit. Other accurate methods include using an infrared ear thermometer or a temporal artery thermometer.