Becuz there are no jobs around, and when there is no jobs, there is no money
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.
Answer:
Mountains
Explanation:
There are many mountains in the western united states
Answer:
Correct Answer:
B. False
Explanation:
The Hayward earthquake which happened in 1868 was minimal in terms of death of people (Approximately 5 ) and the properties destroyed. This is because, then, the area was sparsely populated.
<em>Currently, the area of the active earthquake is densely populated with buildings, and people. Should there be any earthquake there now, the damage would be devastating inclusive of the number of people dying being in high number.</em>
