Q2 Science Final Review

A student builds a circuit that lights a lightbulb. A second bulb is added to the same loop between the first bulb and the

battery. Which statement describes the brightness of each bulb?

• The first bulb will be dimmer than it

  was, and the second bulb will not light.

• Each bulb will be as bright as the first

  bulb was.

• The first bulb will be the same

  brightness, and the second bulb will be

  dimmer.

• Each bulb will be dimmer than the first

  bulb was.

The images show two steps in a procedure a student used to examine an electric circuit. Which question might the

student be investigating?

• How does an open circuit compare

  with a closed circuit?

• Is more energy transformed in an

  electric circuit in a light bulb or in a

  wire?

• Is a light bulb an electric insulator or an

  electric conductor?

• How does changing the voltage affect

  the brightness of a light bulb?

Tags

NGSS.MS-PS2-3

Which statement best describes an electric current?

• The measurement of the electric

  potential energy in a circuit

• Type of conductor or insulator.

• Charged particles move through a

  conductor.

• Energy transfers inside of an electric

  device.

Which conditions would prevent an electric current in a circuit and stop any energy transfer from happening? (Select 3

that apply)

• disconnecting a wire

• closing a switch

• adding a second battery

• opening a switch

• removing a battery

The circuit in the diagram is closed, so charge particles travel through the wires and light the bulbs.

• True

• False

Adding which object to a circuit will create a potential energy difference in a circuit?

• wire

• switch

• battery

• light bulb

An electric current occurs in a circuit because negatively charged particles are repelled by negatively charged particles in a battery.

• True

• False

A light bulb is powered by a single D-cell. What happens if two D-cells connected end-to-end are used?

• The light bulb burns brighter because

  the current will be larger.

• The light bulb burns dimmer because

  the current will be smaller.

• The light bulb burns brighter because

  the current will be smaller.

• The light bulb burns dimmer because

  the current will be larger.

An electric (a)   is the movement of electrically charged particles.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

The magnetic domains of a permanent magnet are arranged randomly.

• True

• False