Energy Transformation - SC.7.P.11.2

(SC.7.P.11.2) What is true of energy?

• Energy can be transformed into different forms.
• Energy is easily created and destroyed
• Energy is a measure of the position of an object.
• Energy is a measure of the motion of an object.

(SC.7.P.11.2) Felicity depends on her electric alarm clock every morning to get up in time for school. What energy transformation happens in Felicity's alarm clock to wake her up in the morning?

• electrical energy is converted to thermal energy
• electrical energy is converted to sound energy
• chemical energy is converted to kinetic energy
• sound energy is converted to electrical energy

(SC.7.P.11.2) Sofia connected several light bulbs to a battery as shown in the illustration. After the lights bulbs were on for a few minutes, she placed her hand near one of the bulbs and discovered it was warm. What transformation of energy did Sofia observe?

• light energy to sound energy
• light energy to electrical energy
• electrical energy to light energy
• electrical energy to thermal energy

(SC.7.P.11.2) Trucks, cars, and motorcycles, as shown in the illustrations below, depend on internal combustion engines to move. An internal combustion engine uses air to burn a fuel, such as gasoline, which in turn causes the parts in the engine to move. What energy transformation occurs in an internal combustion engine?

• electrical energy to chemical energy
• chemical energy to kinetic energy
• thermal energy to electrical energy
• kinetic energy to chemical energy

(SC.7.P.11.2) As Rileigh 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 Rileigh observe?

• electrical to light + sound
• chemical to light + sound
• light + thermal to electrical
• kinetic to sound + electrical

(SC.7.P.11.2) Anaya uses a rechargeable electric toothbrush to brush her teeth. As it is used, the energy stored in the battery is depleted to make the toothbrush operate. What happens when Anaya plugs her toothbrush into an electrical outlet to recharge?

• Electrical energy is transformed to kinetic energy.
• Electrical energy is transformed to chemical energy.
• Chemical energy is transformed to sound energy.
• Chemical energy is transformed to kinetic energy.

(SC.7.P.11.2) When you bend a glow stick, a small chamber inside breaks, releasing a substance that reacts with other substances inside the glow stick. The reaction that takes place causes the glow stick to glow. What energy transformation takes place when a glow stick is lit?

• electrical energy to light energy
• chemical energy to light energy
• thermal energy to light energy
• sound energy to light energy

(SC.7.P.11.2) Some hydroelectric plants generate electricity from water flowing though a dam as illustrated. Also illustrated is a windmill, which can generate electricity from wind. What transformation of energy occurs in both a hydroelectric plant and a windmill?

• chemical energy to electrical energy
• sound energy to electrical energy
• light energy to electrical energy
• kinetic energy to electrical energy

(SC.7.P.11.2) Joshua wakes up in the morning for school when his mother turns on the light in his bedroom. His brother William wakes up only when he hears his alarm clock. Which of the following statements is correct?

• Joshua depends on electrical energy being transformed to sound energy to wake up.
• Joshua depends on electrical energy being transformed to thermal energy to wake up.
• William depends on electrical energy being transformed to light energy to wake up.
• William depends on electrical energy being transformed to sound energy to wake up.

(SC.7.P.11.2) Study the illustration. What is demonstrated in the illustration?

• the transformation of energy
• the creation of energy
• the conservation of energy
• the destruction of energy