Surface runoff happens when, usually a liquid, flows from a high point to a low point because of a driving force in pressure difference as evident in the difference in elevation. In other words, liquid will runoff from the mountains to the plains. Since a low, flat plain has no difference in elevation, it will not cause the fluid to flow. Thus, it is impossible for surface runoff to happen within a low, flat plain.
1. The Earth is a sphere, which is what causes it to spin round and round as it travels around the sun. The side facing away is cooler and darker, and experiences night. Because the Earth is constantly spinning, the line between day and night is always moving around the planet.
2. The sun rises in the morning and sets in the night because Earth rotates in a clockwise motion.
3. B
Hope this helped! ^-^
