Answer:
D) the steady, clocklike decay of certain radioactive isotopes over time.
Explanation:
Geologists use radiometric dating to estimate how long ago rocks formed, and to infer the ages of fossils contained within those rocks.
For example, when rocks are formed, such as igneous rocks (formed when molten rocks cools), certain radioactive atoms are trapped inside the rocks during this formation process. Then these radioactive atoms decay over time.
The age of the rock can be estimated by comparing the occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay.
From the options;
A) this is about the formation of the radioactive molecules and not about radiometric dating
B) this is radiocarbon dating (cabon dating/carbon-14 dating)
C) the <em>assumption </em>is wrong since the radioactive isotopes decays not accumulate.
D) the corect option as I explained earlier.
I'd choose C.) and here is why. If I asked someone for directions to a hotel they are going to describe the roads and buildings to me. They might say it is built in an embankment then I know to look for a hotel in an embankment. If this is wrong please let me know so I can research more on the subject.
Answer:
The Amazon is the world's longest river.
<span>-- There are four of them, spread over several hundred miles of ocean.
-- Together, they form the last British Overseas Territory.
-- Their TOTAL area is about 47 square kilometers (18 square miles).
-- Only Pitcairn, the second largest one, is inhabited. In 2013,
its total population was 56 .
-- The island is inhabited by the descendants of the Bounty mutineers
and the Tahitians who landed there with them (in 1789).
-- Fletcher Christian was the officer who led the mutiny, and almost all of
the 56 current residents are members of families named Christian.
-- Pitcairn is the national jurisdiction (nation) with the smallest population
in the world.</span>
16m -12 - m + 5 = - 52
16m - m = - 52 - 5 + 12
15m = - 45
m = -45 / 15
m = -3
