How did railroads contribute to urban growth during the second industrial revolution? by providing the greatest number of jobs by transporting raw materials and finished goods by transporting materials to parks and museums by providing immigrants with access to enclaves

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.