DCI: PS3.B (B) Conservation of Energy and Energy Transfer – Light
also transfer energy from place to place. Energy can also be transferred from
place to place by electric currents, which can then be used locally to produce
motion, sound, heat, or light. The currents may have been produced to begin
with by transforming the energy of motion into electrical energy.
PE: 4-PS3-2 Make observations to provide evidence that energy can
be transferred from place to place by sound, light, heat, and electric
currents.
PE: 4-PS3-4 Apply scientific ideas to design, test, and refine a
device that converts energy from one form to another.
[Assessment
Boundary: Assessment does not include quantitative measurements of energy.]
[Clarification
Statement: Emphasis is on the change in the energy due to the change in speed,
not on the forces, as objects interact.] [Assessment Boundary: Assessment does
not include quantitative measurements of energy.]
The ideas we see in this standard are:
- light transfers energy from place to place
- energy can be transferred from place to place by electric currents
- electric currents can produce motion
- electric currents can produce sound
- electric currents can produce heat
- electric currents can produce light
- electric currents may have been produced by transforming the energy of motion into electrical energy
The first PE is repeated from other batches. Although the PE makes mention of other types of energy, we should focus on the transfer of energy by light and electric currents in order to align to the DCI. If we use any of the other types of energy, it should only be as a transformation of one kind of energy into electric or light energy.
The second PE will be harder to do on a multiple choice assessment. We will have to ask generalized questions about investigations with certain devices (handheld generators, electrical circuits, batteries, etc.).
Possible Question Starters:
"Students built an electrical circuit like the one shown in the diagram.
Which one of the following correctly explains why closing the switch causes the light bulb to light up?
correct answer - when the switch is closed, electrical energy can move through the wires and is transformed into light energy in the bulb
incorrect answer - when the switch is closed, the light energy from the battery can move through the wires and light up the bulb
"Students are using the set-up pictured here to test how energy can move through a circuit. In order to complete this circuit, they should connect wires between which two points?"
Which one of the following correctly explains why closing the switch causes the light bulb to light up?
correct answer - when the switch is closed, electrical energy can move through the wires and is transformed into light energy in the bulb
incorrect answer - when the switch is closed, the light energy from the battery can move through the wires and light up the bulb
"Students are using the set-up pictured here to test how energy can move through a circuit. In order to complete this circuit, they should connect wires between which two points?"
correct answer - A and D
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