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As air rises and cools, water condenses from the vapor to the liquid state. If the temperature is below the freezing point, then ice crystals are formed instead. Condensation requires a seed called a condensation nucleus around which the water molecules can attach or nucleate themselves. Particles of dust floating in air can act as condensation nuclei; particles containing ions are effective nuclei because the ions electrostatically attract the polar-bonded water molecules.

The diameters of these particles range from 0.001 to 10 micro m and the particles are known as aerosols. For comparison, the size of an atom is about 0.0001 micro m, so the smallest aerosols may be composed of just a few hundred atoms.

Moisture + Aerosols (or a holding media), and cloud formation takes place.

Now what falls?

The tiny droplets grow by condensation and impact with their neighbors as they are carried by turbulent air motion, until they become large enough so that the force of gravity over comes that of friction and they begin to fall.

This rain drops further increase in size as they hit other droplets in the fall path.Therefore, a cloud as one piece will never fall like an Apple on Newton's head.

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What is potential difference

Posted by Alka Kumari 8 years, 1 month ago

CBSE > Class 08 > Science

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Kishan Chaudhary 8 years, 1 month ago

the difference of electrical potential between two points is called potential difference.

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What are nuclei

Posted by Niteen Kumar 8 years, 1 month ago

CBSE > Class 08 > Science

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Kritika Trehan 8 years, 1 month ago

Nuclei is plural of nucleus.

Nucleus : is a membrane-enclosed organelle found in eukaryotic cells.

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What is the role of pituitary gland during the onset of puberpuberty

Posted by Soham Navale 8 years, 1 month ago

CBSE > Class 08 > Science

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Kritika Trehan 8 years, 1 month ago

The pituitary gland is often called the master gland because it controls several other hormone glands in your body, including the thyroid and adrenals, the ovaries and testicles.

It secretes hormones from both the front part (anterior) and the back part (posterior) of the gland. Hormones are chemicals that carry messages from one cell to another through your bloodstream.

If your pituitary gland is not producing sufficient amounts of one or more hormones this is called hypopituitarism.

If on the other hand you are over producing certain hormones, then you would have features due to the over production of the specific hormone concerned.

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What is ions??

Posted by Jacky Chan 8 years, 1 month ago

CBSE > Class 08 > Science

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Amar Kumar 8 years, 1 month ago

Ion is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

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What is aids and how it happened

Posted by Ritika Pandey 8 years, 1 month ago

CBSE > Class 08 > Science

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Pressure is inversely proportional to velocity but if a car moving with high velocity smash you than the pressure exerted by car is more than the car smash you with low velocity it means Bernoulli's Principle is wrong in this case is it true or false ?If false then how?

Posted by Tanish Kumar 8 years, 1 month ago

CBSE > Class 08 > Science

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What happens in woman body between two menstrual cycles

Posted by Bikram Singha 8 years, 1 month ago

CBSE > Class 08 > Science

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Why is reproduction necessary

Posted by Prachi Kumari 8 years, 1 month ago

CBSE > Class 08 > Science

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Shilpa Soni 8 years, 1 month ago

For continuation of life of organisms as it ensures similar kind of individual generation after generation

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Give 1 example of good conducter and bad insulator

Posted by Kirtan Kirtan 8 years, 1 month ago

CBSE > Class 08 > Science

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Suraj Amrutsinh Parmar 8 years, 1 month ago

Copper and wood

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Pratibha Meena 8 years, 1 month ago

Iron

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what do you mean by fermentation

Posted by Ankit Dogra 8 years, 1 month ago

CBSE > Class 08 > Science

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Nishant Kumar 8 years, 1 month ago

The process of converting sugar into alcohol by the action of yeast is called fermentation.

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Sapna Sapna 8 years, 1 month ago

The process of converting sugar into alcohol is called fermentation

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Why should we wash the ends of tester after testing each liquid

Posted by Ritika Meena 8 years, 1 month ago

CBSE > Class 08 > Science

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What is atmospheric pressure? and also some examples in over dialy life.

Posted by Gurudattsingh Chouhan 8 years, 1 month ago

CBSE > Class 08 > Science

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Kishan Chaudhary 8 years, 1 month ago

The force exerted by the Earth's atmosphere per unit are of the Earth's surface is called atmospheric pressure. Example: Bleeding of nose: Our blood contains dissolved oxygen at a pressure slightly more than the atmospheric pressure. When we go to higher altitudes the atmospheric pressure decreases, as a result the blood is pushed out of the nose and it starts bleeding.

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What is slime

Posted by Ashmit Modi 8 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Amar Kumar 8 years, 1 month ago

Slime is an unusual substance with a slippery, gooey texture that is produced by certain animals to fend off predators or fight disease ,but it's also a lot of fun to make.

Slime was a toy product manufactured by Mattel, sold in a plastic trash can and introduced in the winter of 1976. It consisted of a non-toxic viscous, squishy and oozy green or other color material made primarily from guar gum.

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What is the diference between TOFFEE and CHOCOLATE?Please tell the answer quickly and correct.

Posted by Chapati Hindustani Gamers 8 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Amar Kumar 8 years, 1 month ago

Chocolate is a processed, typically sweetened food produced from the seed of the tropical Theobroma cacao tree.Cocoa, Milk, Nuts or Raisins are ingradients of chocolate. Dark Chocolate, Milk Chocolate and White Chocolate.

Toffee is a type of candy, in which sugar or molasses is mixed with butter and occasionally flour, and heated to the point of caramelizing. Toffee is sometimes mixed with nuts or raisins.Sugar/Molasses, Butter, Flour, Nuts or raisins.English toffee, honeycomb toffee, Soft toffee, brittle toffee, etc.

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what is pendulem

Posted by Akshita Shukla 8 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Abhi Sharma 8 years, 1 month ago

A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting,equilibrium position, it is subject to a restoring force due to gravity.

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What is bitumen

Posted by Amayra Yadav 8 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Prayas Waraich 8 years, 1 month ago

Bituman is a patrolium product is used for surfacing roads

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Amar Kumar 8 years, 1 month ago

Bitumen : Bitumen is a naturally occurring mixture of polycyclic aromatic hydrocarbons. The mixture takes the form of a viscous, black, sticky tar-like substance. It can be refined from crude oil by fractional distillation.

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Write one of bitumen

Posted by Amayra Yadav 8 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Amar Kumar 8 years, 1 month ago

Asphalt is a mixture of an aggregate and bitumen and is commonly used as a road surface. Bitumen is also what makes up the La Brea Tar Pits.

Bitumen, dense, highly viscous, petroleum-based hydrocarbon that is found in deposits such as oil sands and pitch lakes (natural bitumen) or is obtained as a residue of the distillation of crude oil (refined bitumen).

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Can a bat hear a infrasonic sounds

Posted by Rahul Ranjan Sahu 8 years, 1 month ago

CBSE > Class 08 > Science