Science Assessment ~ Topics ~ Energy: Forms, Transformation, Transfer, and Conservation ~ Misconception RGM073

During convection, heat molecules form and spread throughout the material.

Items that test for misconception RGM073 in this project (ASPECt) and key idea (Temperature variations in fluids su…)
Item ID Number	Item Description	How Often the Misconception was Chosen	Select This Item for My Item Bank
RG008003	When a cup of water is heated over a flame, the thermal energy of the water at the bottom increases and the heated water will rise to the top of the cup. The cooler water at the top of the cup will sink to the bottom where its thermal energy will be increased by the flame.	22%

Items that test for misconception RGM073 in this project (ASPECt) and other key ideas
RG009003	As the water at the bottom of a cup is heated, it becomes less dense than the cooler water above it. The difference in densities causes the warmer water to rise, carrying its thermal energy with it.	34%
RG185001	When a liquid is heated from below, the molecules of the liquid closest to the heat source spread apart and create a less dense region of liquid. An upward force on the less dense region then pushes the liquid and its energy upward.	30%
RG140002	Energy will be transferred primarily by convection through liquid water and by conduction through solid iron.	19%