Identify if each circuit will light or not light based on the connections.

To determine whether each circuit will light or not, we need to analyze the flow of electric current in each diagram. A circuit will light if it is a complete, closed loop that allows current to flow from the positive terminal of the battery through the bulb(s) and back to the negative terminal of the battery. If there is any break in the circuit (open switch, disconnected wire, etc.), the circuit will not light.

Let's analyze each circuit step by step:

Circuit 1 (Top Left)

- Description: Battery connected directly to a single bulb.
- Analysis: The circuit is a simple closed loop with no breaks. Current can flow from the positive terminal of the battery through the bulb and back to the negative terminal.
- Result: Will light

Circuit 2 (Top Right)

- Description: Battery connected to a bulb, but the wires are not connected to the battery terminals.
- Analysis: The circuit is incomplete because the wires are not connected to the battery terminals. There is no path for current to flow.
- Result: Will not light

Circuit 3 (Middle Left)

- Description: Battery connected to two bulbs in parallel.
- Analysis: The circuit is a closed loop with two paths for current to flow: one through each bulb. Both bulbs are connected properly to the battery terminals.
- Result: Will light

Circuit 4 (Middle Right)

- Description: Battery connected to a bulb, but the wires are not connected to the battery terminals.
- Analysis: Similar to Circuit 2, the circuit is incomplete because the wires are not connected to the battery terminals. There is no path for current to flow.
- Result: Will not light

Circuit 5 (Bottom Left)

- Description: Battery connected to two bulbs in series.
- Analysis: The circuit is a closed loop with a single path for current to flow through both bulbs sequentially. Both bulbs are connected properly to the battery terminals.
- Result: Will light

Circuit 6 (Bottom Middle)

- Description: Battery connected to a bulb, but the switch is open.
- Analysis: The circuit is incomplete because the switch is open, breaking the loop. There is no path for current to flow.
- Result: Will not light

Circuit 7 (Bottom Left)

- Description: Battery connected to a bulb, forming a closed loop.
- Analysis: The circuit is a simple closed loop with no breaks. Current can flow from the positive terminal of the battery through the bulb and back to the negative terminal.
- Result: Will light

Circuit 8 (Bottom Right)

- Description: Battery connected to three bulbs in parallel.
- Analysis: The circuit is a closed loop with three paths for current to flow: one through each bulb. All bulbs are connected properly to the battery terminals.
- Result: Will light

Final Answers

1. Will light
2. Will not light
3. Will light
4. Will not light
5. Will light
6. Will not light
7. Will light
8. Will light

Boxed Final Answer:
\[
\boxed{
\begin{array}{ll}
\text{Will light} & \text{Will not light} \\
\text{Will light} & \text{Will not light} \\
\text{Will light} & \text{Will not light} \\
\text{Will light} & \text{Will light} \\
\end{array}
}
\]