How can a stationary metal sphere have kinetic energy, the energy of motion?(1 point)
Responses
The metal’s molecules are moving around.
The metal’s molecules are moving around.
The metal sphere can be rolled.
The metal sphere can be rolled.
The metal is made of atoms, which are vibrating in place.
The metal is made of atoms, which are vibrating in place.
The metal is made of atoms, which store potential energy.
The correct response is:
The metal’s molecules are moving around.
What do you measure when you find a substance’s temperature?(1 point)
Responses
average kinetic energy of the particles in the substance
average kinetic energy of the particles in the substance
potential energy of the substance
potential energy of the substance
kinetic energy of the substance
kinetic energy of the substance
absolute heat of the substance
The correct response is:
average kinetic energy of the particles in the substance
What happens when thermal energy is applied to an ice cube? (1 point)
Responses
Its water molecules gain potential energy.
Its water molecules gain potential energy.
Its water molecules lose kinetic energy, so the ice cube melts.
Its water molecules lose kinetic energy, so the ice cube melts.
Its water molecules lose potential energy.
Its water molecules lose potential energy.
Its water molecules gain kinetic energy and move around more.
The correct response is:
Its water molecules gain kinetic energy and move around more.
Why does an ice cube melt even in a cold glass of water?(1 point)
Responses
The ice cube is still colder than the water, so thermal energy moves from the ice cube to the water.
The ice cube is still colder than the water, so thermal energy moves from the ice cube to the water.
Ice cubes must always melt eventually.
Ice cubes must always melt eventually.
The water is still warmer than the ice cube, so thermal energy moves from the water to the ice cube.
The water is still warmer than the ice cube, so thermal energy moves from the water to the ice cube.
The air around the water melts the ice cube.
The correct response is:
The water is still warmer than the ice cube, so thermal energy moves from the water to the ice cube.