Betsy uses an electric alarm clock to wake up for school. What energy transformation happens in the alarm clock to help her wake up?(1 point)
Responses
electrical energy converts to sound energy
electrical energy converts to sound energy
electrical energy converts to heat energy
electrical energy converts to heat energy
sound energy converts to kinetic energy
sound energy converts to kinetic energy
chemical energy converts to electrical energy
Betsy uses an electric alarm clock to wake up for school. What energy transformation happens in the alarm clock to help her wake up?(1 point)
Responses
electrical energy converts to sound energy
electrical energy converts to sound energy
electrical energy converts to heat energy
electrical energy converts to heat energy
sound energy converts to kinetic energy
sound energy converts to kinetic energy
chemical energy converts to electrical energy
The correct answer is: electrical energy converts to sound energy
Often Bobby sees his pinwheel spinning, but other times it does not spin. Which statement best explains what makes his pinwheel spin?
(1 point)
Responses
Energy from the wind pushes on the wheel causing the pinwheel to move.
Energy from the wind pushes on the wheel causing the pinwheel to move.
Energy from the ground shakes the wheel causing the pinwheel to move.
Energy from the ground shakes the wheel causing the pinwheel to move.
The colors on the wheel repel one another, causing it to turn.
The colors on the wheel repel one another, causing it to turn.
The Sun heats up the pinwheel, causing it to turn.
The correct answer is: Energy from the wind pushes on the wheel causing the pinwheel to move.
Kim is upstairs, but walks downstairs to the kitchen for a snack. Which statement correctly describes the types of energy she has at the top of the stairs and as she walks down the stairs?(1 point)
Responses
potential energy at the top of the stairs; kinetic energy as she walks down
potential energy at the top of the stairs; kinetic energy as she walks down
kinetic energy at the top of the stairs; potential energy as she walks down
kinetic energy at the top of the stairs; potential energy as she walks down
kinetic energy at the top of the stairs; kinetic energy as she walks down
kinetic energy at the top of the stairs; kinetic energy as she walks down
potential energy at the top of the stairs; potential energy as she walks down
The correct answer is: potential energy at the top of the stairs; kinetic energy as she walks down.
Rebecca climbs the ladder of a large water slide, waits her turn at the top, and then slides down the slide into a pool. Which answer best describes the energy changes during her time on the slide?(1 point)
Responses
potential → mechanical → kinetic
potential → mechanical → kinetic
kinetic → potential → kinetic
kinetic → potential → kinetic
kinetic → mechanical → potential
kinetic → mechanical → potential
potential → kinetic → potential
The correct answer is: potential → mechanical → kinetic.
If we don’t consider friction, what happens to the total mechanical energy as the pendulum swings from position A to position B?
(1 point)
Responses
It becomes greater.
It becomes greater.
It is not conserved
It is not conserved
It remains the same
It remains the same
It declines