Detecting oncoming thunderstorms

From previous slide, describe two ways lightning can form.

A metal lightning rod that extends above a house, as shown in Figures 2 and 3, will become electrically charged as a storm approaches. The negative charge of the cloud pushes negative charges already in the rod down to the connected bell (see Step 1 in Figure 4). Once the bell obtains enough negative charge, it attracts the neutral clapper. The negative charge is transferred from Bell 1 to the clapper. Once enough negative charge transfers to the clapper, the clapper is repelled from Bell 1, which pushes the clapper across to Bell 2. The negatively charged clapper touches the neutral Bell 2 and transfers its charge to Bell 2 through contact. Bell 2 is now negatively charged, but most of this charge escapes into the ground, leaving Bell 2 and the clapper neutral and ready to repeat the process. The clapper moves back and forth between the bells, ringing to warn of the coming storm.

Using the image or the previous slide-create a numbered step by step list of how the franklin bells work to prepare families for oncoming thunderstorms.