Lucy is making a cup of hot chocolate. She puts the chocolate and hot water into a cup, and stirs the mixture.
A few minutes later, she notices the cup and the spoon have gotten hot. What made Lucy’s cup and spoon get hot?
(1 point)
Responses
Heat was transferred through convection to the cup and spoon when the hot water molecules radiated into the cooler molecules of the hot chocolate mix and transferred heat.
Heat was transferred through convection to the cup and spoon when the hot water molecules radiated into the cooler molecules of the hot chocolate mix and transferred heat.
Heat was transferred through conduction to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
Heat was transferred through conduction to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
Heat was transferred through convection to the cup and spoon when the hot water molecules moved through the cooler molecules in the surrounding air and transferred heat.
Heat was transferred through convection to the cup and spoon when the hot water molecules moved through the cooler molecules in the surrounding air and transferred heat.
Heat was transferred through conduction to the cup and spoon when the hot water molecules flowed in currents through the cooler molecules of the hot chocolate mix and transferred heat.
Heat was transferred through conduction to the cup and spoon when the hot water molecules flowed in currents through the cooler molecules of the hot chocolate mix and transferred heat.
Heat was transferred through conduction to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
The picture below shows two flasks, one with hot water and one with room temperature water, which are connected by a conductive metal bar.
In which direction does the thermal energy between the flasks flow?
(1 point)
Responses
Thermal energy flows from the flask with room temperature water to the flask with hot water.
Thermal energy flows from the flask with room temperature water to the flask with hot water.
Thermal energy flows from the flask with hot water to the flask with room temperature water.
Thermal energy flows from the flask with hot water to the flask with room temperature water.
Thermal energy does not flow between the two flasks.
Thermal energy does not flow between the two flasks.
Thermal energy flows equally between the two flasks.
Thermal energy flows from the flask with hot water to the flask with room temperature water.
Heat was transferred through conduction to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
The correct answer is:
Heat was transferred through conduction to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
Explanation:
Conduction is the transfer of heat through direct contact between objects or substances. In this case, the hot water molecules in the cup of hot chocolate came into direct contact with the cooler molecules in the cup and spoon. As a result, the kinetic energy from the hot water molecules transferred to the cooler molecules in the cup and spoon, causing them to heat up.
To get the answer, we need to understand the process of heat transfer and identify how heat was transferred in this scenario.