GEOGRAPHY
Extending for more than 1,200 miles off the northeast coast of Australia is this natural wonder
great barrier reef
Developers of this hyphenated type of battery that powers smartphones & electric cars won the 2019 Nobel Chemistry Prize
Lithium-ion
Change a letter in the color of money into the rapacious desire for said money
green and greed
I can read you like this 2-word term for an exam in which students are allowed to consult notes & texts
open book
In 1187 Pope Gregory VIII called for the third of these military expeditions to the Holy Land
crusade
The border between the Greek regions of Macedonia and Thessaly is the location of this legendary home of the gods
Mount Olympus
In 2019, using the Event Horizon Telescope, the first of these cosmic objects was photographed
Black hole
A word meaning mild or not very flavorful spices things up by becoming a verb meaning to mix
bland and blend
Doctoral students write dissertations; a master's degree usually requires one of these, from the Greek for "proposition"
thesis
Greek words meaning "people" & "rule" gave this form of government its name back in the 5th century B.C.
democracy
Three nations--Uganda, Kenya and Tanzania--border this lake
Lake victoria
A study at Johns Hopkins suggests that being around dogs at an early age may lessen the risk of this "split mind" disorder
Schizophrenia
Change a letter in the opposite of illuminated to get a word for unpleasantly damp & chilly
dark and dank
We'll gamble you know that this word for an exam supervisor once meant a Roman governor
proctor
Mark my words, the triumvirate that succeeded Julius Caesar's was Lepidus, Octavian & this friend of Caesar
marc antony
The Sahara covers most of North Africa, including these two neighboring countries that both start with the letter "M"
Mauritania and Mali
RBBP6, one of these compounds that contain amino acids, has proven effective against Ebola
A protein
A word meaning of short duration turns very sad as one denoting sharp sorrow over a death
brief and grief
An experienced teacher who helps guide a new teacher; also, the name of a guide in the "Odyssey"
mentor
Built in the 3rd century B.C. on an island in the harbor, the Pharos of Alexandria was one of these structures
lighthouse
This major river runs all the way across northern Italy from the western frontier with France to the Adriatic in the east
Po
Observed in 2019, 2I/Borisov is the first identified one of these bodies of rock & ice to visit from outside our solar system
A Comet
With a change of just one letter, to burn slightly becomes a single-named superstar singer/actress
char and Cher
This synonym of proficiency describes a type of learning that allows students to progress at the rate at which they master skills
competency
Cyrus the Great of this empire wanted to conquer Egypt; the next ruler Cambyses II did it
persia