Unit 2

For electrical energy to flow, there must be a(n) ______.

• good battery
• copper wire
• on/off switch
• closed circuit

Tags

NGSS.MS-PS3-5

Why is plastic used to cover electrical wires:

• It looks nice

• It keeps them neat

• It is an insulator

• It is a conductor

Sally is creating a model to show what happens when electricity is used.  She decided to show the motor spinning below as her model. How could she best explain what is happening?

• Electric energy is transformed into energy of motion.
• Heat energy is transformed into energy of motion.
• Heat energy is transformed into electric energy.
• Electric energy is transformed into light energy.

Tags

NGSS.MS-PS3-5

A student was playing music on her new cell phone.    The teacher explained that the phone was powered by a battery. The teacher then asked her to explain what was happening to the energy in her new phone.   How could she best explain this to the class?

• Electric energy is transformed into sound energy.
• Light energy is transformed into sound energy.
• Sound energy is transformed into electric energy.
• Sound energy is transformed into electric energy.

Tags

NGSS.MS-PS3-5

A student wants to use the diagram below to explain what happens when the light bulb turns on. How could she best explain what is happening?

• Light energy is transformed to electric energy.
• Electric energy is transformed to light energy.
• Electric energy is transformed to motion energy.
• Motion energy is transformed to electric energy.

Tags

NGSS.4-PS3-2

Will the light bulb light up if the switch remains open as shown?

• Yes, because the circuit will be complete.
• Yes, because the battery will push the electric current.
• No, because the electric circuit is not complete.
• No, because the battery will push the electric current.

The circuit below lit the light bulb. What is the best claim we can make from this evidence?

• The metal key is an insulator.
• The metal key is a conductor.
• The wires are not conductors.
• The circuit is not complete.

Tags

NGSS.MS-PS2-3

Which statement best describes the circuit in the diagram?

• It is a series circuit.
• It is a parallel circuit.
• There are 2 paths.
• The circuit is opened.

Electricity that flows in a closed path is called a

• path
• current
• circuit

Material that slows down or stops electric current or thermal energy from passing through

• flow
• open circuit
• insulator
• conductor