Heat and Thermal Energy
Science

The movement pattern in a fluid caused by temperature differences within the fluid
Convection current
The movement pattern in a fluid caused by temperature differences within the fluid. Convection current. In science, a convection current is the flow that results when warm fluid rises and cool fluid sinks, creating a circulating pattern.

The amount of heat needed to raise the temperature of 1kg of a substance by 1°C
Specific heat
The amount of heat needed to raise the temperature of 1kg of a substance by 1C. Specific heat. Specific heat is the measure of how much heat energy is required to raise the temperature of a specific material.