Failure to pay a loan is referred to as

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

Are the earth's ocean floor and continents the same age geologically? why or why not?