During evaporation, water rises into the atmosphere and condenses into clouds. When the clouds absorb too much moisture and become heavy, the moisture falls to the ground in the form of precipitation. This is known as the water cycle, which involves evaporation, condensation and precipitation.Know More
The water cycle starts when water evaporates from the ocean surface. Moisture rises and cools, and water vapor forms clouds. Soon, moisture returns to the ground through precipitation. Once water reaches the surface, some of it tends to evaporate back into the air. It also sometimes penetrates the surface and becomes groundwater, which seeps into rivers, streams and oceans. At times, water gets released back into the atmosphere via transpiration, which is the process of water evaporating into the air from the leaves and stems of plants.
Evaporation is the process of liquids changing into gas. It occurs when liquids are either cool or warm. Oftentimes, evaporation happens when liquids are warm. Through the water cycle, water is never lost; it is constantly changed to different forms.
Most of the water that evaporates into the air comes from oceans. Liquids from plants and soil also rise into the atmosphere and form clouds. Snow and ice evaporate even without melting first through sublimation, which is the process of transitioning directly from solid to gas with no intermediate liquid phase.Learn More
When water freezes, the molecules slow down and assume a fixed position, although not quite in the way that one might think. Water is made of molecules with two hydrogen atoms and an oxygen atom, but those molecules don't just stop moving as units. One would think they would all stop, because the Third Law of Thermodynamics says that entropy drops with temperature, getting close to zero. However, ice does not show that property, which is one reason why ice is the only solid less dense than its liquid state.Full Answer >
Clouds form through the evaporation and condensation of water. As water molecules shift between vapor, liquid and solid, they move through the air. When a small amount of air cools very quickly and reaches saturation, the water can condense and become a cloud.Full Answer >
According to the website ScienceBits, the reason breath is visible in cold weather is due to the condensation created when warm, humid air from the lungs collides with the colder, outside air Because frigid air cannot hold as much water vapor as hot air, the resulting saturation of water vapors into the atmosphere becomes visible to the human eye.Full Answer >
Water boils at 100 degrees Celsius because, at that temperature, its vapor pressure equals the pressure of the surrounding atmosphere at sea level. The molecules of liquid are moving too energetically for the outside pressure to keep them in the liquid at boiling temperature.Full Answer >