How is petroleum classified?

What is the main use of petroleum as mentioned in the text?

In which century did the first streets of Baghdad get paved with tar derived from petroleum?

Where were the first commercial oil wells drilled according to the text?

Who used petroleum products in warfare according to the text?

Which empire led in crude oil production by the end of the nineteenth century?

What was the first modern petroleum product refined according to the text?

Where were reports of petroleum product usage found in the sixteenth century?

Who described oil pits near Babel in ancient times?

By the end of the century, the ....................................... Empire led crude oil production.

•Modern petroleum history began with.......................................... refining.

Portuguese Admiral Alfonso reported on petroleum utilization in ___________

The first streets of Baghdad were paved with ______________

crude oil had been used since ancient times for _____________

Herodotus describing oil pits near_____________________