What does convection mean in science examples?

What does convection mean in science examples?

Convection is the circular motion that happens when warmer air or liquid — which has faster moving molecules, making it less dense — rises, while the cooler air or liquid drops down. Convection is a major factor in weather. That current can result in wind, clouds, or other weather.

What is the definition of convention in science?

In physical sciences, numerical values (such as constants, quantities, or scales of measurement) are called conventional if they do not represent a measured property of nature, but originate in a convention, for example an average of many measurements, agreed between the scientists working with these values.

What is meaning of convection of heat?

Heat convection is a mode of heat transfer by the mass motion of a fluid such as air. Heat convection occurs to the surface of an object where the surrounding fluid of object is heated and moved energy away from the source of heat.

What do you mean convention?

1 : a meeting of people for a common purpose a teachers’ convention. 2 : a custom or a way of acting and doing things that is widely accepted and followed Follow the conventions of punctuation in your writing. 3 : agreement sense 3 a convention among nations.

What is meant by convection in physics?

Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. This is because the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume.

What is convection class 7th science?

Convection: The process of heat transfer from one part of a fluid to another part by the actual movement of the particles of the fluid is called convection. Liquid and gases are heated by the process of convection. For example, the heat from the sun reaches the earth through radiation mode.

What is the meaning of convention in physics?

In physics, a sign convention is a choice of the physical significance of signs (plus or minus) for a set of quantities, in a case where the choice of sign is arbitrary. In general, a sign convention is a special case of a choice of coordinate system for the case of one dimension.

What are facts about convection?

Convection is the name for a means of heat transfer, as distinguished from conduction and radiation. It is also a term that describes processes affecting the atmosphere, waters, and solid earth. In the atmosphere, hot air rises on convection currents, circulating and creating clouds and winds.

What are some examples of convection?

While convection is the heat transfer that occurs by the movement of a heated medium, such as air or water, radiation is the transfer of energy by electromagnetic waves through space. Some examples of convection are a greenhouse, the rising air in the atmosphere and an electric heater that warms up a cold room.

What are 5 facts about convection currents?

1) Vertical circulation within a fluid that results from density differences caused by temperature variations. 2) In meteorology, the process in which air, having been warmed close to the ground, rises. 3) Within the Earth, the radiogenic heat release results in convective motions causing tectonic plate movements.

What is the definition of convection in science?

Convection: is the transfer of heat through fluids (gases or liquids) from a warmer spot to a cooler spot. The particles in fluids (liquids or gases) can move from place to place when heated. Convection occurs when particles with a lot of heat energy move and take the place of particles with less heat energy.