Educational worksheet for students to identify whether light bulbs will light in various electrical circuit configurations.

To determine if the light bulbs will light up, we need to check if there is a complete path (a closed circuit) for electricity to flow. Electricity flows from one end of the battery, through the wires and components, and back to the other end of the battery. If there is a break in the path or if the path doesn't connect back to the battery, the bulb will not light.

Let's look at each circuit step by step:

1. Circuit 1:
- There is one battery.
- The wire goes from one side of the battery to a switch.
- From the switch, it goes to a light bulb.
- From that light bulb, it goes to another light bulb.
- From the second light bulb, the wire goes back to the other side of the battery.
- The switch appears to be closed (connected).
- This forms a complete loop.
- Result: The bulbs will light.

2. Circuit 2:
- There is one battery.
- One wire goes from the battery to a light bulb.
- Another wire goes from the battery to another light bulb.
- However, the two light bulbs are not connected to each other, and the wires do not form a return path to the other terminal of the battery. It looks like two separate wires coming out of the battery but not connecting back. Actually, looking closer, it seems like a single loop is attempted but one connection is missing between the two bulbs or back to the battery. Let's trace carefully: Wire from positive terminal -> Bulb 1. Wire from negative terminal -> Bulb 2. There is no wire connecting Bulb 1 and Bulb 2. Therefore, the circuit is open.
- Result: The bulbs will not light.

3. Circuit 3:
- There are two batteries.
- A wire goes from the first battery to a light bulb.
- From the light bulb, a wire goes to the second battery.
- However, look at the connections on the batteries. The wire from the bulb connects to one terminal of the second battery. The wire from the first battery connects to one terminal of the first battery. But there is no wire connecting the remaining terminals of the two batteries together to complete the loop. The circuit is broken between the two power sources.
- Result: The bulb will not light.

4. Circuit 4:
- There is one battery.
- A wire goes from one terminal of the battery to a light bulb.
- From that light bulb, a wire goes to a second light bulb.
- From the second light bulb, a wire goes back to the other terminal of the battery.
- This forms a complete, unbroken loop.
- Result: The bulbs will light.

5. Circuit 5:
- There is one battery.
- A wire goes from one terminal of the battery to a light bulb.
- From that light bulb, a wire goes to a second light bulb.
- From the second light bulb, a wire goes back to the *same* terminal of the battery it started from? No, let's trace carefully.
- Wire leaves left side of battery -> goes to bottom-left bulb.
- Wire leaves bottom-left bulb -> goes to top-right bulb.
- Wire leaves top-right bulb -> goes to right side of battery.
- This creates a complete path from one side of the battery, through both bulbs, and back to the other side of the battery.
- Result: The bulbs will light.

6. Circuit 6:
- There is one battery.
- A wire goes from one terminal of the battery to a light bulb.
- From that light bulb, a wire goes to a second light bulb.
- From the second light bulb, the wire ends. It does not connect back to the battery. There is a gap in the circuit.
- Result: The bulbs will not light.

Final Answer:
1. will light
2. will not light
3. will not light
4. will light
5. will light
6. will not light