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Convection is one of the three processes of heat transfer; the other two methods are conduction and radiation. Jacob and Sam explore heat transfer by convection. The other methods of heat transfer are conduction and radiation. The difference of temperature in the air or atmosphere and thus the difference in air pressure or atmospheric pressure create winds. Synonyms: convection.Definition: (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere. The movement of the clouds, the ocean currents and many types of heaters are examples of convection. Wind, in turn, can enter and cool a room if the window is open. Convection currents develop in the atmosphere as well resulting in the formation of winds and clouds. Convection is a way in which heat travels. Please note: Text within images is not translated, some features may not work properly after translation, and the translation may not accurately convey the intended meaning. This also acts as the foundation of the plate or tectonic movements. The second is different ability of Earth's surface to get warmer. The first type (unstable state of atmosphere) can be called spontaneous. The wetland rap is gonna blow you away!https://www.youtube.com/watch?v=X33FX8pG-Dc-~-~~-~~~-~~-~-This fun … Where convection currents converge, plates move towards each other. Convection often stems from conduction. This means that when the sun rises, the air on land warms more quickly than the air above the water. The same safe and trusted content for explorers of all ages. The movement results from changes in density that occur as the fluid warms. A new, third level of content, designed specially to meet the advanced needs of the sophisticated scholar. convection definition: 1. the flow of heat through a gas or a liquid: 2. the flow of heat through a gas or a liquid: 3…. Kids Definition of convection : motion in a gas (as air) or a liquid in which the warmer portions rise and the colder portions sink Heat can be transferred by convection. It must be noted that convection currents apply to liquid or gas, not solids. Convection, process by which heat is transferred by movement of a heated fluid such as air or water. Generally, convection cooking takes three-fourths the time of standard cooking, and, as a rule of thumb, at 25 degrees lower. When the air gets heated up at a place or in an area, it gets hot because the gaseous molecules in the air get heated up and they rise up allowing the cold air around the area to take its place. Convection currents cause the movement of Earth’s tectonic plates. A sea breeze, for example, can be the result of a convection cell. Ready for another? Circulation caused by this effect Convection cooling is the mechanism where heat is transferred from the hot device by the flow of the fluid surrounding the object. Convection is a process of heat transfer where instead of two objects being in touch, the molecules of an object being heated or already hot transit heat within the object and then to the environment. Convection is the transfer of heat by the movement of heated particles into an area of cooler particles. The other methods of heat transfer are conduction and radiation. Convection is the transfer of heat due to the bulk movement of molecules within fluids (gases and liquids), including molten rock (rheid). Convective heat transfer occurs when the surface temperature differs from that of surrounding fluid. Convection is a process of heat transfer where instead of two objects being in touch, the molecules of an object being heated or already hot transit heat within the object and then to the environment. Natural convection occurs when fluids are heated. Convection happens when there is a difference in temperature between two parts of a liquid or gas. Water holds heat better than land. 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. If convective clouds have enough cloud droplets they'll produce convective precipitation. Learn more. Convection happens when there is a … You can experience convection when you light a match. However, in this article convection is taken to be in the form of heat convection. Because heat rises, the hotter air in the room drifts up to the ceiling, while the cooler air in the room settles near the bottom of the room, where you are. We’ve been busy, working hard to bring you new features and an updated design. Convection currents form, which are streams of gas or liquid powered by convection. This type of heat transfer is called convection. For example, atmospheric circulation moves warm air to cool places, causing wind. Convection current develops in the mantle of the earth due to the repeated heating and cooling cycles of the magma. After translating an article, all tools except font up/font down will be disabled. These convection currents move vertically (up and down) and cause winds and thunderstorms. Sometimes natural convection is the opposite of what you want. But with convection cooking, an integrated fan circulates the hot air around and across the rolls, cooking them all evenly and all at the same time, and in less time than in a standard oven. Convection definition: Convection is the process by which heat travels through air, water, and other gases and... | Meaning, pronunciation, translations and examples The other two being radiation and conduction. To re-enable the tools or to convert back to English, click "view original" on the Google Translate toolbar. Natural convection results from the tendency of most fluids to expand when heated—i.e., to become less dense and to rise as a result of the increased buoyancy. This cycle is called the convection current. The other method is convection. Insulation is used to stop heat energy transfers from buildings and the human body. The process is repeated. The cold air gets heated up and rises creating a cycle of heated air rising up and cold air taking its place. Convection definition, the transfer of heat by the circulation or movement of the heated parts of a liquid or gas. This creates wind. A low-density area forms over the land. Such methods include the movement of air by a fan or the movement of water by a pump. Convection currents within the earth move layers of magma, and convection in the ocean creates currents. Convection is one of the three types of heat transfer; the other two being radiation and conduction. Convection. There are two types of convection: natural and forced convection. Accessible across all of today's devices: phones, tablets, and desktops. Convection refers to the process of transfer of heat or energy through a fluid (gas or liquid) from high temperature to low temperature. Choose a language from the menu above to view a computer-translated version of this page. See more. When this happens, heat energy moves out of the warmer object and into the cooler object. Once the water gets heated up, the hot molecules of water rise up forcing the dense cold molecules of water on top to move down. Convection is the movement of heat because of the movement of warm matter. Forced convection is when fluids or gases are moved by outside forces, not by a change in temperature. Conduction, convection and radiation Energy can be transferred by conduction, convection and radiation. *This post contains affiliate links. ★ Convection definition for kid: Add an external link to your content for free. Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it. Convection is the process of transferring energy through direct matter transfer. The movement of the plates, and the activity inside the Earth, is called plate tectonics . Similar words: natural action, natural process, action, activity.Definition: a process existing in or produced by nature … The first kind (conduction) occurs when two objects of different temperature are placed in direct contact with each other. One is instable state of atmosphere. They are conduction, convection, and radiation. The air directly above the lit match is always hotter than the air around the match. Search: Academic disciplines Business Concepts Crime Culture Economy Education Energy Events Food and drink Geography Government Health Human behavior Humanities Knowledge Law Life Mind Objects Organizations People Philosophy Society Sports Universe World Arts Lists Glossaries Human Nature … Convection is one of three main types of heat transfer. Improved homework resources designed to support a variety of curriculum subjects and standards. The figure below illustrates this. There are many ways heat is transferred from one object to another and within the very same object that is being heated or is already hot. When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along. This occurs until both objects are at the same temperature. Filed Under: Definitions for Kids Tagged With: Definitions and Interesting Facts for Kids, © 2020 HealthResearchFunding.org - Privacy Policy, Definitions and Interesting Facts for Kids, 14 Hysterectomy for Fibroids Pros and Cons, 12 Pros and Cons of the Da Vinci Robotic Surgery, 14 Pros and Cons of the Cataract Surgery Multifocal Lens, 11 Pros and Cons of Monovision Cataract Surgery. convection Bedeutung, Definition convection: 1. the flow of heat through a gas or a liquid: 2. the flow of heat through a gas or a liquid as…. Some of this movement is caused by differences in density. Convection is one form of energy transfer where heat energy is transferred by large scale movement in a gas or liquid. Convection is a type of heat transfer that can only happen in liquids and gases, because it involves those liquids or gases physically moving. (Examples of dry convection include convection that occurs on sunny days when air is dry, or convection that occurs early on in the day before the heating is strong enough to form clouds.) They make a teabag rocket to demonstrate the hot air rising causes convection currents. We hope you and your family enjoy the NEW Britannica Kids. Convection is a transfer of heat related to the movement that occurs within a fluid due to the rising of hotter materials paired with the sinking of colder materials. Convection is a way in which heat travels. Conduction is when heat moves from one object to another object through direct touch. What is heat for kids? This transfers heat. The heated molecules take up more space and rise to the top, while the cooler molecules sink to the bottom. Heat convection is a mode of heat transfer by the mass motion of a fluid such as air. So if we have a bunch of air particles here, so let's say this is the cool air up here, and it makes sense why cool air is going to be more dense than hot air. These cooler molecules then become heated. Convection includes sub-mechanisms of advection (directional bulk-flow transfer of heat), and diffusion (non-directional transfer of energy or mass particles along a concentration gradient). Natural convection occurs when fluids are heated. When the heated molecules cool down in the absence of a heat source, they would move down allowing the heated molecules at the bottom to rise up. With forced convection, you control the movement of the warm or cool fluid, often using a fan or pump.. For example, take a room on a cold winter’s day. Convection often stems from conduction. KidzSearch Safe Wikipedia for Kids. 4 people chose this as the best definition of convection: A transmitting or conveyi... See the dictionary meaning, pronunciation, and sentence examples. In liquids and gasses, when heated from the bottom, the bottom layer of the fluid will be heated. Britannica does not review the converted text. When a heat source or a heated object comes in contact with another object that is less hot or cold, then the contact will lead to transfer of heat from the hot object to the cold object. This occurs because hotter materials have less density than colder ones. The formation, movement and eventual precipitation of the clouds are all by the virtue of convection currents. For instance, when you boil a pot of water, you are essentially heating the pot of water through conduction as the heat source is in direct contact with the pot. Encyclopædia Britannica, Inc. Convection is a process through which heat is transferred by the movement of a heated fluid—that is, a liquid or a gas. 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. By continuing to use this site, you consent to the terms of our cookie policy, which can be found in our. The fluid can either air, which is the most common, or another suitable liquid. Heat can be transferred through conduction which is basically by the virtue of touch or being in contact. Convection cells occur in Earth's atmosphere on both small and large scales. This movement of hot and cold molecules will create a current and this is known as convection current. Now convection, this is around the idea that hot air is less dense. When the fluid molecules are heated, the fluid becomes larger and lighter. Jump to: navigation, search. To share with more than one person, separate addresses with a comma. It occurs when heat is transferred by the movement of liquids or gases. Other convection currents can occur in the atmosphere, the layer of gas that surrounds Earth. It’s important to understand convection’s definition before considering examples, so you’re clear on what convection really is. Take a minute to check out all the enhancements! Convection is a type of heat transfer that can only happen in liquids and gases, because it involves those liquids or gases physically moving. Convection currents also result in precipitation, including snowfall. During the cooling process the heat causes an expansion of the fluid and a reduction in its density. Convective Precipitation . Unlike conduction, convection cannot take place in solids. Atmospheric convection is caused by one of two possibilities. Heat is a. form of energy. It occurs when heat is transferred by the movement of liquids or gases. This is conduction. 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