This is concerning Rotation. If it is dawn in the eastern United States, what is it in the western United States? Why? My answer --- It is nighttime. This is because the sun rises in the East and sets in the West. Is this correct?

Answer 1

That's right. I suggest you add that because the earth rotates toward the east the East Coast sees the sun about 3 hours before the West Coast.

http://www.physicalgeography.net/fundamentals/6h.html

Answer 2

it is day