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.
Answer:
C. To prevent the suppression of Citizen rights in a country.
Explanation:
Social protections are offered from the government to protect the citizens while they are in another country.
The first one is correct and the second one is B
Answer:
c) on the outer banks of the meander loops
Explanation:
The meandering streams form in places that have low elevation and are flat, covered with softer sediments. The stream starts as mostly straight, but as time passes it erodes one of the banks, while depositing on the opposite bank, become very curvy, snake-like in shape, thus a meandering stream. In the meandering streams, the water has the most velocity at the outer banks. This results in greater erosion of the outer banks, and this part constantly moves outwards. In the same time, the water has the least velocity at the inner bank, resulting in deposition of the material that it has been carrying with it, so this part constantly grows inwards.
