What is in line 4 I don’t see anything??
Answer:
While physical weathering breaks down a rock's physical structure, chemical weathering alters a rock's chemical composition. Physical weathering works with mechanical forces, such as friction and impact, while chemical weathering takes place at the molecular level with the exchange of ions and cations.
Answer with Explanation:
"Railroads" played a vital role regarding empire-building in<em> Afro-Eurasia.</em> They became essential especially during the "Age of New Imperialism" <em>(1870s). </em>It aided the locomotion that was needed for great empires. <u>Europe became more powerful</u> because the <em>railroads, together with money</em>, allowed them to control other countries, especially the agrarian ones.
It allowed them to gain control of <em>other nation's</em><em> natural resources </em>as well. One example of this are the "trunk lines" which connect the commercial centers with the seaports in Africa. This allowed the <em>gold fields</em> and<em> diamond fields</em> to be directly connected to the port. This were then destined to the <em>factories </em>and <em>markets</em> in Europe. The railways (locomotives) also extended to other areas including Asia such as <em>China, Thailand, India, etc</em>.
Changes its color. . . . . .