For half of the radioisotopes of a certain kind to decay into its more stable isotope, the amount of time required is called the

radiocarbon dating is typically used to date more recent objects like cloth, wood, and plant fibers.

rocks cannot be accurately dated using isotopic dating because this rock type is formed through the sedimentation of different rocks and mineral fragments.

using the principle of faunal succession, scientists can determine the age of rocks by the embedded within them.

respond to the following based on your reading.

briefly compare and contrast relative dating and absolute dating methods.

87rb has a half-life of 47 billion years, while  14c has a half-life of 5,730 years. which isotope would you use to date a fossil from the paleozoic era? briefly explain your choice.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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d. changes in climate and historical records

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the ems is the abbreviation for the emergency medical services. it is a service provided by a group of medical professionals specialised doctors and other healthcare staff.

any one can call 911 in case of any medical emergency and a group of health care professional will come and give the treatment required. every day the ems staff receive many phone call, which are related to different types of medical emergencies, out of which 25-28% are exclusively related to the respiratory issues.

so, the correct answer is 25-28%.