Ends with "O"
Famous 90s/2000s dances
Specific date songs
March Madness Mascots
Psy-ence
100
This "Jackass" alum was one of the standouts with his propensity to put himself into very painful situations.
Steve-O
100
Originally released as a step-aerobics routine for his nephew, DJ Casper released this classic dance song in 2000, and became synonymous at school dances, birthday parties, weddings, and all sorts of functions. "Everybody, clap yo hands."
The Cha-Cha Slide
100
(1978)
Do you remember
The 21st night of __________?
Love was changin' the minds of pretenders
While chasin' the clouds away
"September" - Earth, Wind, and Fire
100
In their first year of post-season eligibility, the University of California San Diego won their conference, punched their ticket to the big tournament, and feature this as their mascot.
Tritons
100
This is referred to as the "powerhouse" of the cell where organelles are responsible for producing ATP.
Mitochondria
200
A type of shorts with large pockets to hold things, or all the things a ship has in its hold
Cargo
200
In the 90s, Los Del Rio popularized this dance, later remixed in 1996 by the Bayside Boys. It would go on to spend 14 weeks at #1 on the Billboard Charts.
Macarena
200
(1972)
Another day in the park
I think it was the Fourth of July
Another day in the park
I think it was the Fourth of July
People talking, really smiling
A man playing guitar
and singing for us all
"Saturday in the Park" - Chicago
200
The University of Wisconsin earned a #3 seed and feature this "B" animal as their mascot, a carnivorous mammal closely related to weasels, otters, ferrets, and the wolverine.
Badgers
200
This element, with the atomic number 1, is the most abundant in the universe.
Hydrogen
300
Food and Wine magazine says not to stress about constantly stirring this Italian rice dish; every 30 seconds should be ok
Risotto
300
In 2006 Dem Franchise Boys popularized this dance where one proceeds to tilt their body in one direction, then create a noise utilizing several of their fingers.
Lean Wit It, Rock Wit It
300
(2004)
Hello, there
The angel from my nightmare
The shadow in the background of the morgue
The unsuspecting victim
Of darkness in the valley
We can live like Jack and Sally if we want
Where you can always find me
And we'll have Halloween on Christmas
And in the night, we'll wish this never ends
We'll wish this never ends
"I Miss You" - Blink 182
300
Representing the West Coast Conference, Saint Mary's features this mascot; a person of Celtic origin, particularly from Ireland or Scotland, who speaks Gaelic
Gaels
300
This is the only mammal capable of flying.
Bat
400
This company's "Pop!" line of small figurines includes two versions of Alex Trebek: one with a mustache and one without
Funko
400
This dance became viral on YouTube in 2006 by DJ Webstar and Young B. "Let it rain, clear it out" and please don't forget "the soda on the side."
Chicken Noodle Soup
400
(1972)
It was the third of September
That day I'll always remember, yes I will
'Cause that was the day that my daddy died
I never got a chance to see him
Never heard nothin' but bad things about him
Momma I'm depending on you to tell me the truth
Momma just hung her head and said, son
"Papa Was a Rollin' Stone" - The Temptations
400
Drake (the college, not the dude) is in the tournament field and features Griff II, a live mascot of this British breed of mastiff.
Bulldog 
400
This is the name of the pre-programmed death cell process.
Apoptosis
500
This garnish is typically added to finish fruity or sweet drinks and cocktails. Shirley Temples typically have 2-3 of these.
Maraschino (cherries)
500
Jaleel White made this dance famous in the 90s in a season 2 episode of "Family Matters." It became so famous that he cameoed or was referenced doing this dance in episodes of "Full House" and "Step by Step"
The Urkel
500
(1997)
6:00am, day after Christmas
I throw some clothes on in the dark
The smell of cold, car seat is freezing
The world is sleeping, I am numb
Up the stairs to her apartment
She is balled up on the couch
Her mom and dad went down to Charlotte
They're not home to find us out
"Brick" - Ben Folds Five
500
Out of the Big 10, Purdue features this, a person who works with steel, iron, or copper to create and maintain structures that hold hot gas or liquid, such as boilers, tanks, and pressure vessels
Boilermaker
500
A Geiger counter measures this
Radiation