Staar Review Circuits

The picture 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? (5.6B)

• 0

• 1

• 2

• 3

Which of these changes to the electric circuit shown will cause the lightbulb to light up? (5.6B)

• 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 wire the same on both sides of the lightbulb

A string of light with small bubs is shown here. The bulbs are connected by wire that is covered with an insulator. When the lights are on, electricity travels in ----(5.6B)

• a complete circuit

• a sound wave

• a light ray

• an incomplete path

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? (5.6B)

• 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 ring louder.

Tags

NGSS.MS-ETS1-1

Most cars have lights, power locks, radios, and other equipment that use electricity. Electric circuits power this equipment. Each circuit has a fuse that completes it. The picture below shows one type of fuse a car may have. Which of these describes one thing that could happen if the wire in a car fuse burns out? (5.6B)

• The car's lights will burn brighter.

• The car's radio will not work.

• The car's turn signal will blink too slowly.

• The car's power windows will open faster.

A group of students built the circuit shown here. The lightbulb does not glow. Which statement explains this observation? (5.6B)

• The battery is not charged.

• The lightbulb is not 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

A simplified diagram of a system using solar energy is shown. To recharge the battery for later use without lighting the bulb, which of the following switches should be closed? (5.6B)

• Switch S only

• Switches R and S only

• Switches R and T only

• Switches R, S, and T

Tags

NGSS.MS-ETS1-1

All the lightbulbs in this circuit are lit. Which change would cause all the bulbs to go out? (5.6B)

• Removing Wire 1

• Removing Wires 2 and 4

• Removing Wires 2 and 5

• Removing Wires 3 and 4

Students constructed a circuit using different-colored lightbulbs. What will happen if Switch 3 is closed and the other switches are left open? (5.6B)

• 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.

Tags

NGSS.3-PS2-3

NGSS.4-PS3-2

This circuit has three lightbulbs and a bell. Which procedure will result in only the blue lightbulbs operating? (5.6B)

• 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

Tags

NGSS.MS-ETS1-1