Misc: The top selling debut album of all time was __________ by ______________.?

Questions

What state has the camellia as the state flower?

What ancient people started mining and smelting coper ore, in 5000 BC?

What food gets its name from the Aztec word xocoatl, meaning "bitter water"?

This is the longest word that can be made using the letters on only one row of the keyboard?

What do you call the explosion of a giant star?