math
This type of angle measures exactly 90 degrees.
right angle
This is the only continent on Earth that has no native species of ants.
antartica
This is the freezing point of water on the Celsius temperature scale.
0
This punctuation mark is used at the very end of a sentence to indicate a direct question.
a question mark
Despite their name, these popular fairground treats are not made of jelly at all, but are actually deep-fried or baked rings of yeast dough.
jelly doughnuts
Discovered by an ancient Greek mathematician, this theorem states that a² + b² = c² for a right-angled triangle.
he Pythagorean theorem
This Italian city is globally famous for its leaning white marble bell tower.
pisa
Sir Isaac Newton famously developed his laws of universal gravitation after watching one of these fruits fall from a tree
an apple
This figure of speech makes a direct comparison between two unrelated things using the words "like" or "as."
a simile
In 2006, the International Astronomical Union officially demoted this icy celestial body from a full planet to a "dwarf planet."
pluto
In statistics, this term refers to the middle value in a sorted list of numbers, as opposed to the average.
the median
This is the only country in the world that is also its own entire continent.
australia
These red and white blood cells travel through your blood vessels suspended in this yellowish liquid, which makes up over 50% of human blood.
plasma
This is the specific term for a word that is opposite in meaning to another word, such as "hot" and "cold."
an antonym
This everyday kitchen tool was completely missing for the first 48 years after the tin can was patented, forcing people to use hammers or chisels to open them.
a can opener
This is the only even prime number.
2
This massive landmark, visible from space, was built across northern China to protect against historic invasions.
the great wall of china
This invisible gas, which makes up about 78% of Earth's atmosphere, is the most abundant element in the air we breathe.
nitrogen
In grammar, these action words—like "run," "think," or "explode"—express what the subject of a sentence is doing.
verbs
This specific color, a pale grayish-green named after a dried culinary herb, became an incredibly popular mid-century aesthetic choice for kitchen appliances.
sage green
In fractions, this is the specific term for the bottom number, which indicates how many equal parts the whole is divided into.
the denominator
This city is the official capital of the United States.
Washington D.C
This chemical element, symbolized by the letters "Fe" on the periodic table, forms the core of the Earth and is vital for transporting oxygen in human blood.
iron
This literary device involves the repetition of the same consonant sound at the beginning of adjacent or closely connected words, like "Peter Piper picked."
alliteration
This is the only letter in the English alphabet that does not appear anywhere in the official name of any of the 50 US states.
Q