Science worksheet on electrical circuits with questions about components and their functions.

Let's solve each question step by step based on the diagram and the concepts of electrical circuits.

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1. Name the parts of the circuit labelled X, Y and Z.

Looking at the diagram:

- X is a battery (it provides the electrical energy).
- Y is a switch (it controls the flow of current).
- Z is a wire (it connects the components and allows electrons to flow).

✔ Answers:
- X: Battery
- Y: Switch
- Z: Wire

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2. Write the letter of the path that best matches each statement.

This question refers to the path (likely meaning the component or part), so we match each function to the correct label (X, Y, or Z):

i. Provides the power source → X (Battery)
ii. Path for electrons to flow → Z (Wire)
iii. Opens or closes the circuit → Y (Switch)

✔ Answers:
- i. X
- ii. Z
- iii. Y

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3. Explain what happens to the light bulb when the switch is closed. (1)

When the switch is closed, the circuit becomes complete, allowing electric current to flow from the battery through the wire, the bulb, and back to the battery. The current passes through the filament in the bulb, heating it up and causing it to glow.

✔ Answer:
The light bulb lights up because the circuit is completed, allowing current to flow through the filament, which heats up and emits light.

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4. What is the name given to an object that does not allow electrons to flow through it easily?

An object that resists the flow of electrons is called an insulator.

✔ Answer:
Insulator

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5. Which object is the best conductor of electricity?

Options:
a. Plastic
b. Glass
c. Copper

- Plastic and glass are insulators.
- Copper is a metal and a very good conductor of electricity.

✔ Answer:
c. Copper

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6. Mr. Smith works at an electrical plant. He wears rubber gloves to work every day. Explain why Mr. Smith uses these gloves daily. (1)

Rubber is an insulator, meaning it does not conduct electricity. Wearing rubber gloves helps protect Mr. Smith from electric shocks by preventing current from passing through his body if he touches live wires or electrical components.

✔ Answer:
Rubber gloves prevent electric shocks because rubber is an insulator and does not allow electricity to pass through it, protecting Mr. Smith from injury.

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✔ Final Answers Summary:

1.
- X: Battery
- Y: Switch
- Z: Wire

2.
- i. X
- ii. Z
- iii. Y

3. The light bulb lights up because the circuit is completed, allowing current to flow through the filament, heating it and producing light.

4. Insulator

5. c. Copper

6. Rubber gloves are insulators and protect Mr. Smith from electric shocks by preventing current from flowing through his body.

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Let me know if you'd like this formatted as a printable answer sheet!