Answer:
TRUE
Explanation:
The earth is comprised of three distinct layers namely the core, mantle and the crust. The core is the extreme interior layer which is comprised of the denser elements like iron, nickel and other siderophile elements. Thee denser minerals are deposited, by sinking into the core of the earth forming the highest density layer. The core was formed about 1 to 1.5 billion years back.
Whereas, the least dense elements were concentrated in the upper region of the earth forming the crust. These are the lighter elements so it did not get sink into the bottom. But still many of these elements are found in association with the core rocks. There occurred constant evolution on the crustal portion of the earth.
Thus, these elements are found in larger proportions in the crust and were formed during the initial formation of the earth.
Hence, the above-given statement is True.
Answer:
The answer is D.
Explanation:
Physical geography look at the natural processes of Earth and human geography look at the impacts and behaviour of human.
Answer:
200 CE.
Explanation:
The Silk Road was a network of routes through Central Asia, along which trade was conducted for many centuries between China and eastern Asia on the one hand and the Middle East and the Mediterranean on the other. For centuries, from classical times to the late Middle Ages, the Silk Road was the most important connection between East and West.
The western part of the route was completed in the 5th century BC, while the Central Asian portion of the route was already in use around 115 BC during the Han dynasty. Land trade declined in the Middle Ages, when it shifted to maritime transport.
Answer:
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