Radioactive uranium decays into lead. What relative amount of uranium and lead would you expect to find in the oldest rocks?
Very little uranium and very little lead
A lot of uranium and very little lead
Very little uranium and a lot of lead
A lot of uranium and a lot of lead

Why might collective bargaining fail, causing a union to go on strike? a the union agrees with the boss about wages. b the boss compromises about work hours. c the factory goes out of business, causing the workers to lose their jobs. d the boss refuses to address dangerous working conditions in the factories.