<span>The answer is the second option: James Watt played an important role in the Industrial Revolution by developing a process to making steams enginces a reliable power source. James Watts was a Scotish mechanical engineer and inventor famous by his improvements of steam engines. Today we know from him because the power unit - Watt, was named after him, in recognition of his tremendous contributions to the technology..In 1765 he created a new model of steam engine incorporating a separate condensign chamber for the steam. </span>
I'm pretty sure that (A) is the correct answer
<span><span><span>The crust: low density silicate rock, 5-70 km thick. There are two distinct types of crust.<span><span>Continental crust is variable in thickness and composition. Thickness ranges from 5-70 km. The composition ranges from mafic to felsic.</span><span>Oceanic crust is uniform in thickness and composition. It is 5-6 km thick and is mafic in composition.</span><span>The differences in thickness and density between continental and oceanic are responsible for the existence of ocean basins due to isostatic balance as the crust floats on the more dense mantle.</span></span></span><span>The mantle: high density, ultramafic silicate rock which can flow when subjected to long duration stresses. The mantle is over 2900 km thick and makes up over 80% of the volume of the Earth. The mantle is not molten!</span></span><span>The core: iron and nickel, liquid outer region with a solid center. The core is just over half the diameter of the Earth.</span></span>
Answer:
(B) Slavery, banned by the Mexican constitution, must not be practised.
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Explanation: The Battle of Gettysburg was a turning point in the Civil War in that Lee's failure to take the war into the North showed the limitations of the Confederate cause and made it so that the war would be contained to and thus the damages would be felt exclusively in the South.
