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Convection is the process by which heat is transferred by a "fluid" (which, in this case, can actually mean a liquid or a moving gas - both are considered "fluids").
Heat is always transferred from an area of high heat to an area of low heat, regardless of the method. When your hand touches a hot stove, heat moves from the stove to your hand to try to "even out" the amount of heat between the two objects.
In convection, heat is first transferred from an area of high heat to the fluid, then from the fluid to an area of (relatively) lower heat.
Imagine you're sitting downwind of a bonfire. The wood has lots of heat - some of it is transferred to the air. The air is pushed toward you by wind, and when the air hits your skin, there is another heat transfer because your skin has less heat than the air. The net result is a transfer of heat from the wood to your skin, and we say this is by convection.
Another example might be the way everything in a small kitchen gets warm in a hurry when things are baking in a hot oven. Some radiation occurs, but lots of air picks up heat from the stove, and then rises to be displaced by cooler air. The hot air heats things in the upper regions of the kitchen, and then cools and sinks. It then may return to the stove to pick up more heat as hot air there continues to circulate upward. Convection currents in air transfer heat.
Wiki User
∙ 13y ago
Wiki User
∙ 6y agoConduction is the transfer of thermal energy (heat) via the movement and subsequent collision of atoms in a material. Elevated movement of the atoms in one material can increase the movement of atoms in another material that is in physical contact with it, thus transferring thermal energy.
Wiki User
∙ 11y agosweating can take away heat away from the body
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The ways in which a human can gain and lose heat?
A person can lose/gain heat in five ways: Conduction is the transfer of heat directly from one object to another. For example sitting on the cold leather seats of an unwarmed vehicle. Convection is the loss of heat through moving air or liquid. When it is cold we lose heat through the blowing wind Evaporation occurs when a liquid changes into a gas. Sweating is an example of evaporation. Radiation is heat sent outward into the air from your body and into nearby colder objects. It is also known as infrared energy. Respiraton is also when our body breathes in warm and humidified air and exhales carrying heat from the body.
Where does body heat escape in a human's body?
Body heat escapes from all of your body. It escapes more in places where we sweat more often, such as the armpits and forehead. It escapes when we blush as the blood is closer to the surface of the skin so heat can escape easier.
What is the purpose of hair on your head?
Help protect Skull and Brain. Also important for hair growth.
How does your body get rid of excess heat?
There are many ways one is perspiration. The sweat evaporates and cools the body because of the latent heat of evaporation of water. (evaporative cooling) This is called thermoregulation. Also, if the temperature around you is hotter than your body, you lose heat by radiation and conduction. Blood vessels also get bigger near the skin when you are hot to help heat leave the body. Blood vessels getting bigger is called vasodilation and this is another method of thermoregulation. One other method of cooling is used by the hairs on your body. When the hairs are flat they increase the flow of air next to the skin increasing heat loss by convection.
What would happen if organisms didn't lose heat to their environment during metabolism?
If organisms did not lose heat through bodily activities such as sweat, your body would increase in heat such as receiving a fever. Biology states that an organism under high heats would cause the enzyme-substrate composition of an organism to denature, or deform, causing problems of some functions in the organism. If too much denaturing occurs the organism may also face a possibility of death.
How can the body lose heat from radiation conduction and convection?
For example, you are touching something that feels like you are putting your hands into something very ice cold. That is how you can lose heat from your body.
Do you lose a lot of body heat through your hands?
no
How do you lose body heat?
mainly through you skin and breathing.
The ways in which a human can gain and lose heat?
A person can lose/gain heat in five ways: Conduction is the transfer of heat directly from one object to another. For example sitting on the cold leather seats of an unwarmed vehicle. Convection is the loss of heat through moving air or liquid. When it is cold we lose heat through the blowing wind Evaporation occurs when a liquid changes into a gas. Sweating is an example of evaporation. Radiation is heat sent outward into the air from your body and into nearby colder objects. It is also known as infrared energy. Respiraton is also when our body breathes in warm and humidified air and exhales carrying heat from the body.
When you get cold while your swimming does your body lose heat from conduction convection radiation or reflction?
"Reflction" (I assume you mean "reflection") isn't really a way to lose heat. Convection is really only important within a body; it's largely irrelevant when talking about heat transfer from one distinct body (you) to another (the water). There may well be convection in the water, but that has only a secondary impact on you and how cold you are.That leaves radiation and conduction. Both of these processes are going on, but of the two, conduction is by far the more significant in this particular case.
How is density involed in the process of convection?
the differences in density cause the fluids to move in currents, which mixes them all together so that they may lose heat to the other fluids, thus transferring energy through convection
Where do you lose the most body heat?
You lose most of your body heat through your head. This is why cold-weather places often have extreme solutions to keep the head warm such as a scarf, scull cap, or fur headresses.
How does your body lose heat through urination and defecation?
Heat loss through urination and defecation occurs due to the high water content in urine and feces. When urine leaves the body, it takes away some heat with it. Similarly, when feces are eliminated, they also carry away a small amount of heat. However, the overall amount of heat lost through these processes is relatively small compared to other mechanisms such as evaporative cooling through sweating.
Describe the changes happening to someones body when exercising?
the body heats, you lose less heat, & liqiuds come through your skn
Does dog lose heat through tail?
They usually lose heat by panting.
How is heat energy lost from an object?
There are three ways to transfer heat energy (conduction, convection, radiation); any of the three can occur, for an object to lose heat energy.
In what ways can a person lose heat to or gain heat from the surroundings?
A person can lose/gain heat in five ways:Conduction is the transfer of heat directly from one object to another. For example: sitting on the cold leather seats of an un-warmed vehicle.Convection is the loss of heat through moving air or liquid. When it is cold we lose heat through the blowing windEvaporation occurs when a liquid changes into a gas. Sweating is an example of evaporation.Radiation is heat sent outward into the air from your body and into nearby colder objects. It is also known as infrared energy.Respiration is also when our body breathes in warm and humidified air and exhales carrying heat from the body.
