What two unprecedented events occurred in connection with the era voting?

The two unprecedented events that occurred in connection with the ERA voting was 1. when the ERA failed to get approved within its seven-year limit, in which the Congress had to extend the approval time with three more years and, 2. five states tried to take back their votes after the bill was not approved even with its extension.

Inner core, outer core, crushosphere lower mantle, upper mantle, asthenosphere, crust (don’t quote me in that bc I think that’s what it is but I’m not sure)