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B. Fill in the blanks.

1. A circuit is like a path that electricity follows to make things .

2. The two ends of a battery are called the positive (+) and (-)
ends.

3. are materials that allow electricity to flow through them
easily.

4. A is a device that detects light and sends signals based on its
brightness.

5. When the circuit is electricity cannot flow.

C. State whether the following statements are true (T) or false (F).

1. A closed circuit allows electricity to flow.

2. An LED is a type of resistor.

3. Insulators help electricity to flow easily.

4. Potentiometers are used to control the volume or brightness.

5. The power source is not necessary for a circuit to work.

21 st
Try It Yourself Activity Century #Technology Literacy
Skills
Activity: Build a Simple Circuit

21 st
Scenario-Based Questions Century #Critical Thinking
Skills
1. Scenario 1

Imagine you are at home and the lights go out. You remember how to create a
simple circuit. Explain how you could use a battery, LED, and a switch to make
a flashlight.

2. Scenario 2

You see a streetlight that turns on when it gets dark outside. Describe how a
light sensor like an LDR could be used to control this streetlight.

Introduction to Electronics and Circuits 51