Convection currents are circular patterns that move air and liquids as a result of unequal heating and cooling. Hot air rises because it is less dense and then sinks as it cools. In the investigation, students observe hot water rising and then the cold water sinks.

For instance, when you hold an ice cube, heat is transferred from your warm hand to the cold ice and melts it. Your hand feels cold because it is losing heat energy. There are three ways that heat can be transferred: by conduction, convection, and radiation.

Currently I have two answers: Infrared radiation from the water transfers thermal energy to the ice cube, which increases the ice cube particles KE store, breaking the intermolecular bonds of the ice cube, melting it.

The primary method of heat transfer when ironing clothes is conduction. The iron heats up very quickly because it is metal, which is a good conductor….

convection

Most types of paper burn at 233 degrees Celsius (or 451 degrees Fahrenheit). As the water heats up, it conducts heat away from the paper, preventing the paper from reaching that crucial temperature. Heat also continues escaping via the steam that’s created when water boils.

After boiling a cup of water, I recorded its temperature every minute for thirty minutes….

This is because when we heat the paper cup containing water, then the heat supplied to the paper cup is transferred to water inside it by conduction. Due to continuous transfer of heat from Paper Cup to water , the paper cup does not get heated to its ignition temperature. Hence the paper cup does not catch fire.

A water pot is small and non viscous, therefore the convection inside is strong enough to ensure that the heating is uniform. Therefore, stirring it won’t change the time to boil it, in itself. But stirring it will prevent to COVER the boiling pot. So, COVER your pot instead of STIRRING it to improve boiling speed.