Hot air is less weight than the cold air, the hot air rise and go outside from the vantelators on the roof the cold air come inside and make the room cold.
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
Because the atoms do not move around. The whole idea of convection is that 'groups' of things move about. In the case of heat convection these moving groups take or bring their heat with them.
there are no such things as dragons
organelles
Flowers have pollen in them. And other things that are inside flowers.
Fluids.
Things with a lower density will float on things with a higher density. If you take a fluid (air or water) and heat it, the portion that is heated usually expands. The same mass takes up more volume and as a consequence the heated portion becomes less dense than the portion that is not heated. Get it? Hope you do!
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
Sun Radiation Convection
convection and expansion
The heat circulates quickly.
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
The pointy things inside a cave are called stalactites.
You can not store things inside microwave oven. You can store any things inside microwave oven only if you are in remote jungles of Africa and without electricity.
Heat flow is made by conduction, convection or radiation.