Answer:
The correct answer is d) atmospheric air pressure
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Explanation:
The atmospheric pressure, also known as barometric, is what causes the weight of the mass of air that is acting on the earth.
This value will be higher or lower, depending on the altitude at which we are, with reference to the lowest point considered, which is usually the sea level, but is also influenced by some atmospheric effects produced by the circulation of currents of warm or cold air.
Theoretically, it is considered that the maximum value of atmospheric pressure is achieved at sea level, although in some parts of the earth there are areas below that level. Its value at this point corresponds to 1013 mbar or 760 mm Hg. The value of 1 atmosphere (atm) is also commonly used as a reference unit, but is not included in the International System of Units.
It is also known as barometric pressure, due to the instrument used for its measurement. It was Evangelista Torricelli who in 1643 invented the first barometer, although the name was given by Edme Mariotte some years later.
Answer:
Answered
Explanation:
The Greek Dark Ages was time interval between collapse of the Mycenaean civilization, around 1200 BCE and the Greek Archaic period, around 800 BCE
Iron working technological innovation that stands out during this period, So the dark age is also known as Early iron age.
Igneous rock derives it's name from the Latin word ignis which means fire. It is formed when the magma after volcanic eruption gets cool and solidified either on the surface of earth crust or inside the earth crust. These rocks are characterized by their hardness. These rocks undergoes no chemical weathering but exhibit very low mechanical or physical weathering may occur. Therefore, hardness is the property which can be used to identify the origin of an igneous rock.
<span>Geographic concepts are ideas which posit connections between humans in both natural and cultural settings, they are connected to space and proximity and offer geographers a lens in which to consider and present information that they conclude about the world. Based upon these conclusions that can be drawn from these concepts, geographic questions can be answered with evidence from how humans interact with the world.
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