Question

what are convection currents.

Answer 1

Answer:

These movements in the soup are called convection currents, and they are the reason that a pot of boiling water moves around so rapidly. The water is heated, becomes less dense and rises, cools, becomes denser, and sinks, over and over again.

Explanation:

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Answer 2

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✪A convection current is a process that involves the movement of energy from one place to another.

✪It's due to these currents, we feel hotter when placing hands above a campfire or sitting next to it.

✪The convection currents tend to move a fluid or gas particles from one place to another.

✪These are created as a result of the differences occuring within the densities and temperature of a specific gas or a fluid.

★✰Convection is one among the form of heat transfers , of which the other two are convection and radiation.

✪CONVECTION :-

• It occurs only in fluids , that is, in liquids and gases .
• It happens due ti the reason that molecules within liquids or gases are free to move.

Hence, convection current is defined as "a process of continuous heating up of liquids or gases by the process called as convection."

• Examples of convection currents - Boiling water, campfires , changes in the weather , currents occuring in ocean.

✪EXTRA :-

✪CONDUCION :-

• Conduction transfers heat via direct molecular collision.
• An area of greater kinetic energy will transfer thermal energy to an area with lower kinetic energy.
• Higher speed particles will collide with lower speed particles.
• As a result, the kinetic energy of the slower speed particles increase.

✪RADIATION :-

• All hot bodies emit heat by radiation.
• Radiation does not require a medium.
• Sunlight enters the earth surface because of radiation.

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