HYDRAULIC fracturing, or fracking, is a drilling method used to extract petroleum (oil) or natural gas from deep in the earth. In the fracking process, cracks in and below the earth surface are opened and widened by injecting water, chemicals, and sand at high pressure. Hope this helps you.
Answer:
As rocks on the earth go through various cycles, similarly the variation in chemical take place.
Explanation:
- As there exists a difference in the composition of minerals chemical composition from there pure forms, some variation exists in the chemical composition of elements like the size of irons, ad the temperatures at which the crystal grows.
- As rocks are an aggregate of more than one mineral they have distinct qualities like the granite is defined by the by proportions of quartz, and feldspar. Like the coal is a sedimentary rock being composed of carbon.
- The presence of oxygen, silicon, magnesium, calcium, and sodium in rocks defines their constituents, as by far Oxygen and Silicon is two of the most dominant 47% and 28%.
- An example of chemical alteration on earth is the volcanic rocks that are both igneous and metamorphic Depending on the chemical properties of these rocks the various metallic nature of elements the rocks have different temperatures and magnitudes.
The process is called Exfoliation.
Answer: B. International migration and voluntary migration: Family A from Mumbai has convinced their close friends Family B to emigrate to London as they did in order to help start up their business.
Explanation:
Migration is the process of moving from the place of origin to another area due to personal, social or political reasons. Throughout human history, we have migrated for various reasons, from searching for food, from safer areas to live or exploring new territories, it is part of our nature.
Currently, migration is classified as voluntary or forced migration and internal or international migration.
- Voluntary migration consists of voluntary internal or international displacement, permanent or temporary, to seek better economic opportunities.
- Forced migration occurs when the displacement is carried out against the will, due to situations of violence, natural disaster or eviction.
- Internal migration is what occurs within the same territory, for example from rural to urban areas.
- International migration consists of movements from the country of origin to another country.
In this case, Family A convinces Family B to make an international migration (from India to England) voluntarily (To establish a business).
<em>I hope this information can help you.</em>
