Energy Transformations Question Preview (ID: 33374)
Types Of Energy Their Transformations.
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What is true of energy?
a) Energy can be transformed into different forms.
b) Energy is easily created and destroyed.
c) Energy is a measure of the motion of an object.
d) Energy is a measure of the position of an object.
Betsy depends on her electric alarm clock every morning to get up in time for school. What energy transformation happens in Betsy’s alarm clock to wake her up in the morning?
a) electrical energy is converted to sound energy
b) sound energy is converted to electrical energy
c) electrical energy is converted to thermal energy
d) chemical energy is converted to kinetic energy
Francesca connected several light bulbs to a battery. After the lights bulbs were on for a few minutes, she placed her hand near one of the bulbs and discovered it was warm.
a) electrical energy to light energy
b) light energy to sound energy
c) light energy to electrical energy
d) electrical energy to thermal energy
rucks, cars, and motorcycles, depend on internal combustion engines to move.
a) chemical energy to kinetic energy
b) electrical energy to chemical energy
c) kinetic energy to chemical energy
d) thermal energy to electrical energy
As Marsha reached to plug her cell phone power cord into an outlet, she heard the snap of a blue spark between the outlet and her plug. What transformation of energy did Marsha observe?
a) chemical → light + sound
b) electrical → light + sound
c) kinetic + sound → electrical
d) light + thermal → electrical
Energy can be transformed from one form to another in a system. What happens in all transformations of energy?
a) The total energy of a system increases.
b) Electrical energy is changed into light energy.
c) Chemical energy must be supplied for the transformation.
d) One form of energy is changed into a different form of energy.
Boris used a nutcracker to open some walnuts. Each time he squeezed the nutcracker, he heard the walnut shell crack. What transformation of energy did Boris cause to happen when he cracked the walnuts?
a) sound energy to kinetic energy
b) sound energy to thermal energy
c) kinetic energy to sound energy
d) kinetic energy to light energy
What is the correct energy transformation in a flashlight?
a) Electrical to mechanical to light
b) mechanical to sound to electrical
c) chemical to light to electrical
d) chemical to electrical to light
Fausto wakes up in the morning for school when his mother turns on the light in his bedroom. His brother Carlos wakes up only when he hears his alarm clock. Which of the following statements is correct?
a) Fausto depends on electrical energy being transformed to sound energy to wake up.
b) Carlos depends on electrical energy being transformed to sound energy to wake up.
c) Fausto depends on electrical energy being transformed to thermal energy to wake up.
d) Carlos depends on electrical energy being transformed to light energy to wake up.
The motions of the toy robot shown below are driven by an electric motor. The power source for the toy's motor is a pair of batteries. Based on this information, which of the following BEST summarizes the energy transformations taking place in the t
a) Mechanical energy is transformed into light energy, and the light energy is transformed into electrical energy.
b) Electrical energy is transformed into chemical energy, and the chemical energy is transformed into mechanical energy.
c) Chemical energy is transformed into electrical energy, and the electrical energy is transformed into mechanical energy.
d) Light energy is transformed into electrical energy, and the electrical energy is transformed into mechanical energy
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