Cicuits

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

Which of the following energy transformations occur when a lamp is plugged into the outlet and the bulb is inserted into the lamp?

• thermal - electrical - light

• electrical - light - thermal

• light - thermal - electrical

• electrical - thermal - light

A person enters a room, flips the light switch, and a lamp turns on. What causes the lamp to turn on?

• The circuit is open, and flipping the switch closes the circuit.

• The circuit is closed, and flipping the switch opens the circuit.

• The wires are connected, and flipping the switch disconnects the wires.

• The wires are connected, and flipping the switch disconnects the lamp.

Which of these substances conducts electricity the best?

• wood
• brick
• copper
• plastic

What material would be safest to use as an insulator to cover electrical wires?

• rubber
• tin
• aluminum
• water

This instrument can be used to see if materials conduct electricity.  Which of these groups contains items that could all conduct electricity to complete the circuit?

• rubber ball, plastic comb, nail
• paper clip, penny, screw
• cork, dollar bill, tweezers
• pencil, eraser, spoon

water is a______?

• conductor
• insulator

materials that allow electricity to flow through them are called

• conductors
• current
• fuse
• resistor

when the circuit is _____, current does not flow.

• open 
• closed

this is the symbol for a _____?

• switch
• light 
• battery
• wires