This river flows from its source in Turkey to the Shatt Al Arab, where it unites with the Tigris.
What is the Euphrates?
100
Archaeologists measure the fluorine in these animal remains to determine their relative age.
What is bones?
100
You'll find the word "infinite" within the calculus term for infinitely small, but not quite zero.
What is infinitesimal?
100
In April 1796 this French officer defeated the Sardinians at Mondovi, gaining Savoy & Nice for France.
What is Napoleon?
100
Like the governor of Illinois, the Simpsons live in a city named this
What is Springfield?
200
Deposits of silt are causing this longest Italian river's delta to advance into the Adriatic several feet per year.
What is the Po River?
200
Ideally, this, the apparent boundary between the sky & the Earth, is at 90 degrees from the zenith.
What is the horizon?
200
A perfect number is the sum of all of these except itself; for example, 28 is the sum of 1, 2, 4, 7 & 14.
What is its factors?
200
In 1517 Cordova became the first Spaniard to reach Mexico when he landed on this east coast peninsula.
What is the Yucatan?
200
Second-grader Lisa Simpson is a prodigy on this jazz instrument.
What is the saxophone?
300
Near the German-Dutch border this river splits into 2 channels:
the Lek & the Vaal.
What is the Rhine?
300
Pumice is a variety of this type of rock formed when lava cools.
What is igneous?
300
A solid with parallel congruent bases which are both polygons. The bases must be oriented identically. The lateral faces are all parallelograms or rectangles.
What is a prism?
300
In a 1797 Canary Islands battle, this British naval hero's right arm was wounded & later amputated
What is Lord Nelson?
300
Famous Simpsons expressions include Bart's "Don't Have A Cow" & this Homeric syllable of frustration.
What is d'OH?
400
Cities on this river include Louisville, Cincinnati & Wheeling, West Virginia.
What is the Ohio River?
400
The neon in a sign produces light when electricity ionizes it into this fourth state of matter.
What is plasma?
400
This equation includes only second degree polynomials. Some examples are y = 3x2 – 5x2 + 1, x2 + 5xy + y2 = 1, and 1.6a2 +5.9a – 3.14 = 0.
What is a quadratic equation?
400
On July 22, 1969 he designated Juan Carlos as his successor in Spain.
What is Francisco Franco?
400
Pronounced correctly, the name of this Simpsons creator rhymes with "caning".
What is Matt Groening?
500
A short channel connects this large lake with the Gulf of Venezuela.
What is Lake Maracaibo?
500
This creator of the Periodic Table has an element named for him in the actinide series.
What is Mendeleev?
500
A geometric figure with no indentations. Formally, a geometric figure is this if every line segment connecting interior points is entirely contained within the figure's interior.
What is convex?
500
In 490 B.C. this Persian king sent an army into Greece but it was defeated at the Battle of Marathon.
What is Darius?
500
Simpson kids' favorite TV fare includes Krusty the Clown & this insanely violent cartoon