STAAR Released Questions

This circuit has five light-emitting diode, or LED, lights. It also has one battery and one switch.

Which LEDs produce light when the switch is in the position shown?

Which procedure would most likely allow the bulbs to light?

• Open the switch and then connect the two wires that are attached to the wood block.

• Switch the positions of the two wires that are connected to the battery and then open the switch.

• Move the switch closer in the circuit to the battery.

• Connect the two wires that are attached to the wood block.

Tags

NGSS.MS-ETS1-2

The diagram shows an electric circuit with four bells that a student plans to build.

When the student connects the wires as shown, which of the bells will ring?

Which change would cause all the bulbs to go out?

• Removing wire 1

• Removing Wires 2 and 4

• Removing Wires 2 and 5

• Removing Wires 3 and 4

What will happen if Switch 3 is closed and the other switches are left open?

• Only the white bulb will operate.

• None of the bulbs will operate.

• Only the white and yellow bulbs will operate.

• Only the red and blue bulbs will operate.

Which procedure will result in only the blue lightbulbs operating?

• Close Switches 1 and 2 and leave Switch 3 open

• Close Switch 3 and leave Switches 1 and 2 open

• Close Switches 2 and 3 and leave Switch 1 open

• Close Switch 2 and leave Switches 1 and 3 open

The lightbulb does not glow. Which statement explains this observation?

• The battery is not charged.

• The lightbulb is not a part of a complete circuit.

• The circuit does not have a switch.

• The bell uses most of the energy from the battery.

Tags

NGSS.4-PS3-2

The diagram shows the metal posts that are usually found on a battery. The battery can be connected to a bell and a switch to produce sound. Which statement best explains why there are two metal posts on the battery?

• The battery needs only one metal post to connect to the bell, but the other metal post is present in case the first post fails to work.

• The battery needs to form a complete circuit that starts with one metal post and ends with the other metal post.

• One metal post makes a complete circuit with the switch, and the other metal post makes a complete circuit with the bell.

• One metal post makes the bell start to ring, and the other metal post makes the bell louder.

The diagram shows a series circuit with three lit bulbs. How many of the bulbs will remain lit if the wire is cut at the point shown by the arrow?

• 0

• 1

• 2

• 3

Which of these changes to the electric circuit will cause the lightbulb to light up?

• Straightening the wire so that the current can flow more easily.

• Adding a switch and more wire so that the current can flow more easily.

• Turning one battery so that its positive end connects to the other battery's negative end.

• Making the length of the wire the same on both sides of the lightbulb.