Evaporation and transpiration change liquid water into vapor, which ascends into the atmosphere due to rising air currents.

Clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals. For this to happen, the parcel of air must be saturated, i.e. unable to hold all the water it contains in vapor form, so it starts to condense into a liquid or solid form.

Condensation is the process by which water vapor in the air is changed into liquid water. As condensation occurs and liquid water forms from the vapor, the water molecules become more organized and heat is released into the atmosphere as a result.

The process in which water vapor turns into a liquid is called condensation. When the air is warmer than the ground, water vapor condenses on ground surfaces to form dew. The temperature when dew forms is called the dew point.

Water vapor is a relatively common atmospheric constituent, present even in the solar atmosphere as well as every planet in the Solar System and many astronomical objects including natural satellites, comets and even large asteroids.

Dew is a natural form of water, formed as water vapor condenses. Colder air is less able to hold water vapor than warm air. This forces water vapor in the air around cooling objects to condense. When condensation happens, small water droplets form—dew.

Dew occurs when humidity condenses in low areas due to cooler nighttime temperatures. Dew, and its chilly brother frost, are both forms of precipitation that can be collected for water. DO NOT DRINK DEW DIRECTLY, regardless of the number of survival books that tell you it’s okay.

Dew forms when the object, such as the glass, cools down to the dew point temperature. Water molecules in the air continually bombard surfaces, like blades of grass. If the object gets cold enough, and there is enough moisture in the air, condensation is much greater than evaporation and the film grows into dew drops.

Rain, as we know, is what falls from the sky from dark grey clouds. It forms when water in the atmosphere cools to a point where the water condenses into droplets. Dew is what forms on all types of matter normally at night when temperatures are low enough to allow condensation to form.

Rain forms from water vapour condensing high in the sky as clouds. Dew forms from water vapour that condenses on cold surfaces on the ground, like grass or a car on a cool morning (it usually gets a bit cooler early in the morning).

Dew is a type of precipitation where water droplets form on the ground, or on objects near the ground in a process called condensation of moisture. Dew forms during calm, clear nights, when the ground surface and other exposed objects, such as tips of grass or leaves, lose heat by radiation to the sky.

Dew is condensate that forms on the surface, usually by the surface cooling to a temperature below the dew point of the air. Thus the water vapr accumulates onto the surface. Rain is formed by Collision-Coalescence or the Bergeron-Findelsen process.

Historic. The book De Mundo (composed before 250 BC or between 350 and 200 BC) described: Dew is moisture minute in composition falling from a clear sky; ice is water congealed in a condensed form from a clear sky; hoar-frost is congealed dew, and ‘dew-frost’ is dew which is half congealed.

There is no doubt, as Mr. John Aitken proved many years ago, that real dew rises as vapour from the ground and condenses on cold surfaces near the ground.

François explains, “Dew is not enough by itself to keep plants alive long term, but during periods of drought these secondary processes become more relevant. Dew may help some species survive drought conditions.” Dew reduces water stress for plants by three main processes.

On a normal warm day, water evaporates from the warm ground into the air. That means it turns from a liquid into a gas called “water vapor.” When evening comes, the warm ground continues to radiate heat into the air. When this happens, dew forms on surfaces that aren’t warmed by the heat radiated from the ground.

Condensation is responsible for the formation of clouds. Common examples of condensation are: dew forming on grass in the early morning, eye glasses fogging up when you enter a warm building on a cold winter day, or water drops forming on a glass holding a cold drink on a hot summer day.

The factors governing condensation

• The water vapour content of the air.
• Inside room temperature.
• Outside temperature.
• Internal and external temperature variation.

Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.

Water vapor transforms into both liquid and solid cloud particles that grow and fall to Earth as precipitation. When water vapor condenses in the formation of clouds, large amounts of heat – called latent heat is released into the atmosphere.

When the water vapor cools enough, the attractions between the molecules bring them together. This causes the water vapor to change state and become tiny drops of liquid water. The process of changing from a gas to a liquid is called condensation.