Worked example
A wire is disconnected in a battery-and-bulb circuit. What happens to the path?
Answer & why
Answer: It is open.
The gap breaks the complete conducting path.
Grade 4 · Science
Reason about a simple circuit
Recognize that a simple battery circuit needs a complete conducting path.
8 authored questions + worked example
Add to plan
All questions
All 8 authored questions for this skill.
Question 1
In a simple circuit, which component supplies electrical energy?
- the battery
- the switch
- the wire
- the bulb
A hint
Use only safe classroom battery circuits with adult guidance; never test mains electricity.
Answer & why
Answer: the battery
The battery supplies energy for the circuit.
Question 2
In a simple circuit, which component converts electrical energy to visible light?
- the switch
- the battery
- the bulb
- the wire
A hint
Use only safe classroom battery circuits with adult guidance; never test mains electricity.
Answer & why
Answer: the bulb
The bulb emits light while receiving electrical energy.
Question 3
A wire is disconnected in a battery-and-bulb circuit. What happens to the path?
- It is open.
- It is a power source.
- It is closed.
- It is a bulb.
A hint
Use only safe classroom battery circuits with adult guidance; never test mains electricity.
Answer & why
Answer: It is open.
The gap breaks the complete conducting path.
Question 4
A switch joins both sides of a complete wire path. How is the switch described?
- a battery
- open
- closed
- an insulator
A hint
Use only safe classroom battery circuits with adult guidance; never test mains electricity.
Answer & why
Answer: closed
A closed switch completes the conducting path.
Question 5
A test material lets current pass in a complete circuit. What is it called?
- an insulator
- a conductor
- a battery
- a lamp
A hint
Use only safe classroom battery circuits with adult guidance; never test mains electricity.
Answer & why
Answer: a conductor
A conductor allows electric current to pass.
Question 6
A test material prevents current passing in the circuit. What is it called?
- a lamp
- an insulator
- a battery
- a conductor
A hint
Use only safe classroom battery circuits with adult guidance; never test mains electricity.
Answer & why
Answer: an insulator
An insulator resists electric current in this test.
Question 7
A complete path connects a battery and working bulb. What does the path allow?
- the battery to be unnecessary
- current to flow
- energy to appear from nothing
- a permanent gap
A hint
Use only safe classroom battery circuits with adult guidance; never test mains electricity.
Answer & why
Answer: current to flow
A complete conducting path allows current in the circuit.
Question 8
A switch creates a gap in the conducting path. How is the switch described?
- closed
- a conducting joint
- open
- a power source
A hint
Use only safe classroom battery circuits with adult guidance; never test mains electricity.
Answer & why
Answer: open
An open switch breaks the circuit path.