Grade 4 Electricity Review Worksheet

Here are the answers to your Electricity Review worksheet.

1. Match the components with the correct purposes:
* Light bulb → Converts electrical energy into heat and light
* Cell → Provides electrical energy
* Wire → Allows current to travel from one component to another component
* Switch → Opens or closes circuit safely

2. Write one word that each of the following describes:
a. Something that pushes electricity around a circuit: Voltage (or Energy)
b. The flow of electricity: Current

3. Fill in the blanks using the helping words:
a. When the switch in a circuit is opened, there is a gap in the circuit.
b. Nina can turn the lamp off or on by using a switch.
c. Circuit is a path for electricity to flow.
d. The electric iron uses mains electricity when we plug it into socket.
e. There are two poles in battery, they are positive and negative.
f. When the switch is closed, there is no break in the circuit.
g. Electricity flows through a closed circuit.
h. It is dangerous to touch electrical appliances using wet hands.

4. True or False:
If you add a second bulb in a circuit, the bulbs will glow more brightly.
FALSE
*(Reasoning: Adding more bulbs shares the energy, so they usually get dimmer, not brighter.)*

5. True or False:
If you add a second cell in a circuit, the bulb will glow more brightly.
TRUE
*(Reasoning: Adding more cells gives the circuit more power/energy.)*

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Final Answer:
1. Matching:
* Light bulb — Converts electrical energy into heat and light
* Cell — Provides electrical energy
* Wire — Allows current to travel from one component to another component
* Switch — Opens or closes circuit safely

2. One Word:
a. Voltage
b. Current

3. Fill in the Blanks:
a. opened
b. switch
c. Circuit
d. socket
e. positive, negative
f. break
g. flows
h. wet

4. FALSE
5. TRUE