Answer:
The answer is Option B, 3 half-lives.
Explanation:
Potassium–argon dating (K–Ar dating) is a radiometric dating method. It measures the radioactive decay of an isotope of potassium (K) into argon (Ar). Potassium is a common element found in many materials like clay and certain minerals. The technique is best suited to dating minerals and rocks more than 100,000 years old. For shorter timescales, it is unlikely that enough argon (40 Ar) will have accumulated. This dating method is used by geologists and paleoanthropologists in order to understand very great expanses of time and the deposits that the earth has formed. One paleoanthropological example of how the technique has been used is in bracketing the age of deposits at Olduvai Gorge where hominin remains have been found. The scientists have dated lava flows above and below the deposits where fossils have been found. Other paleoanthropological discoveries have also been dated using this technique. It is well suited to sites that show evidence of volcanic activity, as in the case of East African sites like Hadar, Ethiopia.
The false statement is - C. It is common for a plant or animal to fossilize when it dies.
In for a plant or animal to fossilize, there have to certain conditions that will enable that process, or rather preservation. That is not the case usually, and considering the amount of animals and plants that existed, and even more the ones that existed in the geological past, the amount of fossils is extremely small. If it was common for the plants and animals to be fossilized, even 1 out of 1,000, than we would have been seeing and finding fossils pretty much on every spot of the planet, but that is not the case.
Answer:
Stay in your home and secure lock down
Explanation:
In order to help the
student expand his/her knowledge I will help answer the question. This in hope
that the student will get a piece of knowledge that will help him/her through
his/her homework or future tests.
As of the year 2009,
700 million people around the globe lived outside their country of birth. This
number was obtained by a survey in the year 2009.
<span>
The correct answer is 700
million.</span>
I hope it helps,
Regards.
<span> </span>
