Final answer:
During the solar eclipse on August 21, 2017, the moon was between Earth and the sun, creating a shadow on Earth.
Step-by-step explanation:
During the coast-to-coast solar eclipse that occurred on August 21, 2017, the moon was between Earth and the sun. This arrangement is known as a solar eclipse. In a solar eclipse, the moon blocks the light from the sun, creating a shadow on Earth. The path of the moon's shadow started on the West Coast near Portland, Oregon, and traversed the United States, exiting the East Coast in South Carolina.