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Clouds

A cloud is a visible body of very fine water droplets or ice particles suspended in the atmosphere at altitudes up to several miles above sea level. They are generally produced by the condensation of water vapor. Other clouds, less commonly seen, are composed of smokes or dusts.

10,186 Questions

How can the states of water be interchanged?

The states of water can be interchanged through the processes of melting (solid to liquid), freezing (liquid to solid), evaporation (liquid to gas), condensation (gas to liquid), sublimation (solid to gas), and deposition (gas to solid) by adding or removing heat energy.

Does hot air move into cold air or does cold air move into hot air?

Both. Since hot air is less dense than cold air, the hot air rises as the cold air falls (i.e. as the cold air displaces the hot air).

If you were to dye hot air & then inject it into the center of a room, you would observe the dyed hot air rising. What you may not realize is that gravity draws the (invisible) surrounding dense cold air downwards as it displaces the (visible) less dense dyed hot air.

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Previous Posters Answer:

Hot air rises

For precipitation to form the cloud droplets must grow in volume roughly by?

For precipitation to form, cloud droplets must grow in volume by coalescing with other droplets and reaching a size large enough to overcome air resistance and fall as rain or snow. This process, known as collision and coalescence, helps tiny cloud droplets combine and grow larger until they are heavy enough to fall to the ground as precipitation.

What causes water in an ocean to turn into water vapor?

Water in the ocean turns into water vapor through a process called evaporation. This occurs when the water absorbs enough heat energy from the sun to break the intermolecular bonds and transition into a gaseous state. The water vapor then rises into the atmosphere and can form clouds or contribute to the water cycle.

What is the main difference between a cloud drop and a rain drop?

Cloud drops are tiny water droplets that form in clouds and are too small to fall to the ground, while raindrops are larger droplets that have grown in size and weight enough to fall as precipitation. Cloud drops are typically less than 0.02 inches in diameter, while raindrops can range from 0.02 to 0.2 inches in diameter.

When clouds crash together it causes thunder but why doesn't the clouds go throw each other because it is steam?

Clouds are made up of tiny water droplets that are suspended in the air. When two clouds collide, the water droplets within them merge and create larger droplets. This process does not involve the clouds passing through each other physically, but rather the water droplets combining to create larger droplets that eventually fall as rain.

If the gas from dry ice is colorless and clear why does it form clouds of white vapor?

Air holds moisture. The warmer the air, the more moisture it can hold. So when warm air holding a fair amount of moisture comes in contact with the very cold dry ice, it cools down, and some of the moisture condenses out into those clouds you're seeing because the colder air is no longer capable of holding it.

What happens to the molecules that make up a sample of liquid water when the sample absorbs enough heat to reach the boiling point?

Those with the most kinetic energy have enough to thrash about so much that they push their neighbours away and make a hole in the liquid water we call a bubble. Other energetic molecules then burst into the hole and help to keep it from collapsing. If enough molecules burst in, the bubble is so big that it rises to the surface and bursts, releasing a cloud of steam into the air.

The molecules most likely to be able to initiate this formation of bubbles are those at the very bottom of a saucepan where they are touching the hot metal with the fire underneath it. That is why the first bubbles which boil off come from the bottom of the can.

What color are venus' clouds?

The clouds on Venus are typically yellowish-white in color due to the presence of sulfur compounds in the atmosphere, such as sulfuric acid. These clouds completely cover the planet and create a thick, reflective layer that contributes to its extreme heat and pressure.

What is water changing form it liquid state to a gas is called?

The process of water changing from a liquid state to a gas is called evaporation. This occurs when the water absorbs enough energy to overcome the forces holding its molecules together, leading to them escaping into the air as water vapor.

Which term describes the droplets of water that condense on aerosols in the sky?

You may be thinking about the term nucleation or coalescence. Creation of liquid droplets around aerosol particles is called nucleation. The aerosol particles themselves are known as seeds, while the water that form around them are known as droplets. When referring specifically to cloud formation in the atmosphere, the nucleation process is known as coalescence and the seeds can be called cloud condensation nuclei.

These seeds can be natural, as in smaller water/ice particles or synthetic chemicals used for cloud seeding, including silver iodide and dry ice.

Does the temperature increase or decrease in the thermosphere?

It increases, reaching as high as 2,000 degrees Celsius in the upper Thermosphere. As the atmosphere thins, it takes less and less energy to cause changes in temperature. Between ionizing radiation and the direct exposure to the sun's rays (and radiation), the outer atmosphere starts to heat up again, absorbing some of the heat before it reaches the lower atmosphere and surface.

Why water should be called liquid?

water can have different states. you can read a phase diagram of water to see that only within a certain temperature and pressure for water to be in liquid state

~Also: You are able to get wet by it and it has no definite shape.

What is the u-value of vapour barrier?

The u-value of a vapor barrier is typically very low, near 0.1 W/m^2K. This indicates that the vapor barrier is a good insulator against heat transfer. Its primary function is to prevent moisture from passing through and not to provide significant thermal insulation.

Why do clouds float when feathers don't?

because God made them to float

>>>Because clouds are of gaseous molecules, while feathers are not. However, if a bird lost a few feathers whilst up in the air, it would take while for the feather to come down because of drag. Comparable to the time it takes for clouds to precipitate.

Before condensation can occur what must be the relative humidity?

Before condensation can occur, the relative humidity must be 100%. This means that the air is saturated with moisture and cannot hold any more water vapor, resulting in it condensing into liquid.

Air mass that forms over a cold region is called?

Air masses that are cold and forms over polar regions is polar. A cold front occurs when a cold air mass meets and displaces a warm air mass. A front that forms when a warm air mass is trapped between cold air masses and forced to rise is called a occluded front.

How does pressure affect the direction of wind flow?

High pressure systems generally lead to descending air movements, resulting in clear skies and calm weather. In contrast, low pressure systems cause air to rise, leading to cloud formation and potentially stormy weather patterns. Wind flows from high pressure areas to lower pressure areas, creating the movement we observe in our atmosphere.

What is the name given to the process when the vapours of the liquid get cooled?

The process you are referring to is called condensation. Condensation occurs when the vapor of a substance cools and transforms back into its liquid state.

Is cold air drier than warm air?

Cold air has the potential to hold less moisture than warm air. However, whether or not cold air is drier than warm air can also depend on the humidity levels. Cold air tends to feel drier because it has a lower capacity to hold moisture compared to warm air.

How does the water cycle begin?

evaporation( on the basic three step water cycle followed by condensation, and precipitation)

Which of these phase changes does NOT involve changing a liquid to gas?

Sublimation does not involve changing a liquid to a gas. Sublimation is the phase transition of a substance directly from a solid to a gas without passing through the liquid phase.

What happens when liquid is supplied with heat?

When heat is supplied to a liquid, its temperature increases, causing the molecules to move faster and resulting in a phase change from solid to liquid (melting) or from liquid to gas (boiling). The added heat energy disrupts the intermolecular forces holding the liquid together, allowing the molecules to overcome these forces and change state.

The oort cloud may be the source of this icy object?

Comets. The Oort Cloud is a vast region of space beyond the orbits of Pluto and the other outer planets where many comets are believed to originate. These icy objects can be pushed into the inner solar system by gravitational forces and become visible as comets when they approach the Sun.

Why does temperature remain constant during melting and boiling?

During melting and boiling, the energy being added to the substance is used to break the intermolecular forces holding the molecules together, rather than increasing the kinetic energy of the molecules. This means that the temperature remains constant because the energy is absorbed as the substance undergoes a phase change.