A) At a convergent boundary
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The geological history of Earth follows the major events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy). Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left over from the formation of the Sun, which also created the rest of the Solar System.
Earth was initially molten due to extreme volcanism and frequent collisions with other bodies. Eventually, the outer layer of the planet cooled to form a solid crust when water began accumulating in the atmosphere. The Moon formed soon afterwards, possibly as a result of the impact of a planetoid with the Earth. Outgassing and volcanic activity produced the primordial atmosphere. Condensing water vapor, augmented by ice delivered from comets, produced the oceans.
As the surface continually reshaped itself over hundreds of millions of years, continents formed and broke apart. They migrated across the surface, occasionally combining to form a supercontinent. Roughly 750 million years ago, the earliest-known supercontinent Rodinia, began to break apart. The continents later recombined to form Pannotia, 600 to 540 million years ago, then finally Pangaea, which broke apart 200 million years ago.
The present pattern of ice ages began about 40 million years ago, then intensified at the end of the Pliocene. The polar regions have since undergone repeated cycles of glaciation and thaw, repeating every 40,000–100,000 years. The last glacial period of the current ice age ended about 10,000 years ago
B. distance and mass because as distance increases, the gravitational pull decreases and when it decreases, the gravitational pull increase. Also the mass increases, so does the attraction and opposite if it decreases.
Answer:
<u>Funcionalist perspective:</u>
This perspective states that stratification in society is necessary, because there is a difference among the variaty of jobs, and that some jobs are more important than others. This difference called stratification generates inequality, but funcionalists thinks that while more specific a job is, society becomes more productive.
<u>Conflict perspective: </u>
This perspective is against stratification, they don´t agree on inequiality and they ask for it to be reviewed. The unfariness of the difference of salaries between a job and other can be out of proportion. The stratification generates class conflict.
Explanation:
Inequality and social classes:
Funcionalist perspective: thinks that inequality should happened because for instance there are jobs that requires more habilities than others, and are more complex, require more studies and preparation, or are more dangerous. Inequiality exists because some people are more prepare than others.
Conflict perspective: they think that inequality is due to the difference among social classes, dominant classes with more money and power, versus non dominant classes. Social stratification only benefits a small group of people, the one that has advantages of power and money. Not all people can have acces to the same education and preparation than others.