Answer:
Option (A)
Explanation:
The geological time scale is usually defined as the sequential arrangement of all the major and contrasting events that has taken place on earth right after the formation of the earth about 4.6 billion years back.
This scale is comprised of distinct eons, epochs and periods, which are classified on the basis of the major events occurred in the geological time, such as the great mass extinction events, asteroid impacts, abundant supply of oxygen, introduction of new and extinction of old living species.
This is how the boundaries between the intervals of the geological time scale are determine.
Thus, the correct answer is option (A).
B is most likely the answer. Hope this helps.
<span>And igneous rock sample is about 250,000 years old. Would you use uranium-lead radiometric dating to find its age?
Yes, wikipedia says "</span><span>It can be used to </span>date<span> rocks that formed and crystallised from about 1 million years to over 4.5 billion years ago with routine precisions in the 0.1–1 percent range.</span>"
Therefore, 250,000 years can be compared
Okay so lets think hmmmmmmmmmm
Answer:
A.
Explanation:
Acid rain is a chemical reaction to pollutants in the air. Usually man made and distributed through industrial waste.