Because Earth Sciences covers a lot of ground (pun intended) and nobody has the time or ability to do everything well and thouroughly. The field is very highly specialized in its subdivisions.
Specialities and subspecialities help us to delve deeper into the subject of earth science. It is equally important for us to understand the impacts of various areas.
<u>Explanation:</u>
Earth Sciences is a vast subject dealing with pollution, climate, oceans, energy resources, human impacts.
For us to act accordingly, it is essential to have a deeper look into the features.
There are specializations or subspecialities in each feature to be understood.
Scientists are working on each subspeciality to make informed decisions in order to avoid catastrophic failures and disasters as much as possible.
Disasters are unavoidable but minimizing the effects is what we can do.
B. Geothermal refers to heat sources on the Earth’s crust
Explanation:
The geothermal energy is the heat that is derived from the storing of energy that creates by the earth's temperature and the earth's crust is origin for this type of energy along with the radioactive decay of the elements of the crust.
<u>Thus said to be earth's internal heat and needs to be trapped as it can get lost during the formation stages. </u>
The temperature that occurs at the earth's core and the metal zone reaches up to 4000°C and thus the high temperature causes the rocks to melt and give rise to the temperature in the plastic mantle to get activated by the convection currents that reach the surface.
Some examples of this geothermal energy are those of the hot spring and the rising lava or the magmas.
A nomad (Middle French: nomade "people without fixed habitation") is a member of a community without fixed habitation which regularly moves to and from the same areas. Such groups include hunter-gatherers, pastoral nomads (owning livestock), and tinkers or trader nomads.
