As the only mortal member of her kind, her head was placed on Athena’s shield, the aegis, after she was decapitated by the eventual founder of Mycenae, whereupon Chrysaor and Pegasus emerged from her neck. For 10 points, name this snake-haired deity beheaded by Perseus, the most famous of the gorgons, who turned those who gazed upon her into stone.

ANSWER: Medusa

Also called Röntgen rays for their discoverer, and with a shorter wavelength than ultraviolet radiation, for 10 points, name this band of high-energy electromagnetic radiation often used in medical diagnostics.

ANSWER: X-rays

This figure designed the Round Table, and he was a friend and adviser of Uther Pendragon. The creator of the test of the sword in the stone, For 10 points, name this legendary magician who advised King Arthur.

ANSWER: Merlin

Rick Blaine is the main love interest of Ingrid Bergmann’s character in this film directed by Michael Curtiz. For 10 points, name this 1942 film starring Humphrey Bogart, set in the title Moroccan city.

ANSWER: Casablanca

This layer contains the Antarctic ozone hole, and it is located below 50 kilometers in altitude and above 10 kilometers. For 10 points, name this second major layer of Earth’s atmosphere, located below the mesosphere and above the troposphere.

ANSWER: stratosphere