G4自然4-1

Multiple Choice

What components inside a lantern allow it to light up during festivals?

• Battery, circuit, and bulb

• Only a bulb

• Only a battery

• Wire and switch only

Fill in the Blanks

拆開燈罩，可以看到燈籠提把的電線連接著

。

Multiple Choice

Which of the following items commonly found in daily life contain a bulb, wires, battery, and switch?

• Flashlight

• Toy car with lights

• Concert light stick

• All of the above

Open Ended

Name two other objects besides lanterns that contain a bulb, wires, battery, and switch.

Multiple Choice

Which part of a wire conducts electricity and which part does not?

• Copper wire conducts, plastic cover does not

• Plastic cover conducts, copper wire does not

• Both copper and plastic conduct electricity

• Neither copper nor plastic conducts electricity

Multiple Choice

What are the differences between the various types of cylindrical dry batteries shown?

• Their voltage is different

• Their size and usage frequency are different

• They are made of different materials

• They all have the same shape

Open Ended

Explain how a light bulb produces light when electricity passes through it.

Multiple Select

Which of the following are correct about connecting an LED in a circuit?

• The long leg connects to the positive terminal of the battery

• The short leg connects to the negative terminal of the battery

• The long leg connects to the negative terminal of the battery

• The short leg connects to the positive terminal of the battery

Fill in the Blanks

Fill in the blank: When connecting an LED, the long leg should be connected to the battery's

terminal.

Multiple Choice

電線要連接在燈泡的……，燈泡才會發亮呢？

• 螺紋金屬體和底部的接點

• 玻璃罩和燈絲

• 導線和玻璃罩

• 燈絲和螺紋金屬體

Multiple Choice

Why is it not recommended to use an LED instead of a regular light bulb in the battery circuit experiment?

• LEDs are too expensive

• LEDs require more current

• LEDs can be easily damaged by excess voltage

• LEDs do not light up with batteries

Multiple Choice

According to the diagrams, what must be connected to both the battery and the light bulb to make the bulb light up?

• A wire

• A magnet

• A resistor

• A switch

Open Ended

Explain the importance of connecting wires to both the positive and negative terminals of the battery when trying to light a bulb.

Multiple Choice

What would happen if only one wire is used to connect the battery and the bulb?

• The bulb will light up

• The bulb will not light up

• The battery will overheat

• The bulb will explode

Multiple Select

Which of the following are necessary steps to make the bulb light up in the circuit shown?

• Connect one wire to the positive terminal of the battery and the other to the negative terminal

• Connect both wires to the same terminal of the battery

• Connect one wire to the bulb's metal base and one to the bulb's tip

• Connect both wires to the bulb's glass

Fill in the Blanks

In a simple circuit, the electric current flows from the battery's ___ terminal to the ___ terminal.

Multiple Choice

What happens to the light bulb when the circuit is open, as shown in the diagram?

• The light bulb lights up

• The light bulb does not light up

• The battery is removed

• The wires are disconnected

Open Ended

What are the steps to ensure a light bulb lights up when building a simple circuit with a battery and wires?

Multiple Choice

Based on the diagrams and explanations, what are possible reasons why a light bulb does not light up even if the circuit appears to be connected correctly?

• The battery is not powerful enough

• The wires are too long

• The bulb is broken or the battery is dead

• The switch is missing

Multiple Choice

Why do we use lamp holders and battery holders in everyday life when connecting circuits?

• To reduce poor connections and increase safety

• To make the circuit look better

• To use less wire

• To save electricity

Fill in the Blanks

A flashlight uses a

to connect and disconnect the circuit, controlling whether the bulb lights up or not.

Open Ended

Explain how a flashlight switch controls the brightness of the bulb using the internal structure of the switch.

Open Ended

How would you explain the importance of batteries and wiring in making toys work or move faster?

Multiple Choice

What did you learn about how circuits can make light bulbs or decorations light up?

• By connecting wires to a battery and a bulb, the bulb lights up.

• Light bulbs light up only when connected to a switch.

• Decorations light up only with solar power.

• Batteries are not needed for circuits.