Answer:
1. In my point of view, I think the energy that causes evaporation comes from the sun. The sun is what heats the water and makes tiny vapors evaporate into the air which forms clouds.
2. Earth's gravity pulls matter downward, toward its center. It pulls precipitation down from clouds and pulls water downhill. It basically pulls water and precipitation downhill until it connects to a river which eventually runs into an ocean. It allows precipitation to fall.
3. The water in the ocean gets enough sun one day and it evaporates and forms into a cloud. The cloud then relocates over the nearby land. The cloud becomes too dense with water vapor and gravity carries the water down as precipitation, most likely rain or snow. It then flows through little streams and back into the ocean to restart the process.
Hope this helped!
