The water cycle involves water evaporating from surfaces like pavements into clouds due to heat from the sun, then condensing in the clouds and falling as rain which feeds plants. Ocean landforms are varied with hills, plains and mountains under the water similar to land formations. Fresh water is found in lakes, rivers and puddles while being non-salty, and salt water is only in the oceans and polar regions, becoming saltier near the equator. Tides are caused by the moon's gravitational pull leading to the regular rising and falling of sea waters. Humans both utilize water for drinking but also waste large amounts through activities like car washing and taking long baths.