Leanna is investigating heat transfer using a metal nail and foam cup filled with hot water. First, she records the temperature of the water and nail. Next, she places the nail in the hot water for ten minutes. Finally, she removes the nail from the water and records the temperature of the water and nail. The table shows her data. How does the motion of the molecules in the nail change after the nail is placed in the hot water?
Responses
Energy was transferred from the hot water to the nail through convection, causing the molecules in the nail to move faster.
Energy was transferred from the hot water to the nail through convection, causing the molecules in the nail to move faster.
Energy was transferred between the hot water and the nail through conduction, causing the molecules in the nail to move slower.
Energy was transferred between the hot water and the nail through conduction, causing the molecules in the nail to move slower.
Energy was transferred from the hot water to the nail through conduction, causing the molecules in the nail to move faster.
Energy was transferred from the hot water to the nail through conduction, causing the molecules in the nail to move faster.
Energy was transferred between the hot water and the nail through convection, causing the molecules in the nail to move slower.
Energy was transferred from the hot water to the nail through conduction, causing the molecules in the nail to move faster.
An electric fan is plugged into an outlet and the circuit completed, making the fan blades spin. Which of the following correctly describes this situation?
Responses
Mechanical energy is transformed into electrical energy.
Mechanical energy is transformed into electrical energy.
Electrical energy is transformed into mechanical energy.
Electrical energy is transformed into mechanical energy.
Electrical energy is destroyed, and mechanical energy is created.
Electrical energy is destroyed, and mechanical energy is created.
Mechanical energy is destroyed, and electrical energy is created.
Electrical energy is transformed into mechanical energy.
Kyra and Violet are camping with their family. They are roasting marshmallows over a campfire. What types of energy are released by the camp fire?
Responses
nuclear energy and electrical energy
nuclear energy and electrical energy
heat energy and light energy
heat energy and light energy
mechanical energy and magnetic energy
mechanical energy and magnetic energy
chemical energy and sound energy
The campfire releases heat energy and light energy.
How does an ice cube cause hot coffee to become cool?
Responses
Heat from the hot coffee is transferred to the ice cube through convection.
Heat from the hot coffee is transferred to the ice cube through convection.
Cold from the ice cube is transferred to the hot coffee through conduction.
Cold from the ice cube is transferred to the hot coffee through conduction.
Cold from the ice cube is transferred to the hot coffee through convection.
Cold from the ice cube is transferred to the hot coffee through convection.
Heat from the hot coffee is transferred to the ice cube through conduction.
Cold from the ice cube is transferred to the hot coffee through conduction.
The picture below shows a model of a water geyser like those in Yellowstone National Park, which erupt with giant plumes of hot water. Which process drives geyser eruption?
Responses
the convection of water above the hot magma in the mantle
the convection of water above the hot magma in the mantle
the radiation of the Sun's energy into the ground water
the radiation of the Sun's energy into the ground water
the condensation of water that collects underground
the condensation of water that collects underground
the conduction of thermal energy from the ground
The convection of water above the hot magma in the mantle drives geyser eruption.
The correct answer is: Energy was transferred from the hot water to the nail through conduction, causing the molecules in the nail to move faster.
Explanation: In this experiment, the nail is placed in the hot water, and energy is transferred from the hot water to the nail. This energy transfer occurs through conduction, which is the transfer of heat between objects that are in direct contact. When two objects of different temperatures are in contact, heat energy moves from the object with higher temperature (hot water) to the object with lower temperature (nail).
As the hot water transfers its heat energy to the nail, the molecules in the nail start moving faster. This increase in molecular motion is a result of the added heat energy. Therefore, the motion of the molecules in the nail changes and becomes faster after the nail is placed in the hot water.