1. Sound
   Earthquakes
2. Wind speed
   Temperature

For an earthquake to be considered a major event, it must measure at least seven on the Richter magnitude scale. Developed in 1935, the scale has been used to measure earthquakes around the world.

1. The Beatles
   The Temptations
2. The Everly Brothers
   The Crickets

With a career dating all the way back to 1951, the Everly Brothers were responsible for classic hits like "Wake Up Little Susie" and "Cathy's Clown." They are best known for their ability to harmonize, and they broke a lot of ground for artists during the era.

1. Russia
   The moon
2. Florida
   Canada

Mare Tranquillitatis, or the Sea of Tranquility, is on the surface of the moon. Although it is not really a body of water, the impression of an ocean floor was left by a collision over four million years ago.

1. Eagle
   Bear
2. Wolf
   Deer

Although there hasn't been a sighting of a grizzly bear in California since 1922, it is the animal you will find on the state flag. Said to portray strength, the bear has been part of the flag since the Bear Flag Revolt in 1846.

1. Jimmy Carter
   Gerald Ford
2. Ronald Reagan
   Richard Nixon

After all the votes were counted during the 1960 election, John Fitzgerald Kennedy was elected President of the United States, defeating Richard M. Nixon. It was one of the closest races in U.S. history, with just over 100,000 votes separating the two candidates.

1. Limestone
   Quartz
2. Pumice
   Coal

Also good for smoothing out your rough winter feet, the pumice stone is the only type of stone that floats. This volcanic rock is 90% porous on average. Although it may sink eventually, pumice will float at first.

1. World War I
   World War II
2. The Civil War
   The War of 1812

The very first tanks were used by the British at the Battle of Flers-Courcelette in 1916, during the First World War. Although they could not travel more than four miles per hour, they were effective tools on the open battlefield.

1. Ted Bundy
   Jeffrey Dahmer
2. Joanna Dennehy
   Jack the Ripper

For an entire month in 1888, Jack the Ripper held London's East End area of Whitechapel hostage with fear. Killing at least five prostitutes, he was sometimes called the "Leather Apron."

1. Neck
   Arm
2. Stomach
   Knee

Also known as your kneecap, your patella is the flat bone that sits between the femur and your shins. It is held in place by a series of tendons, and it protects the delicate knee joint from harm.

1. Emma Lazarus
   Thomas Jefferson
2. Winston Churchill
   Abraham Lincoln

Officially titled "The New Colossus," the sonnet found at the base of the Statue of Liberty was written by Emma Lazarus. It was written in 1883 to raise money for the statue's pedestal and was engraved on the pedestal in 1903.

1. Grapes
   Peanut butter
2. Steak
   Carrots

While many human foods are just fine for sharing with our furry best friends, grapes should be avoided at all costs. Although the exact reason they are so toxic to dogs is still unknown, merely three grapes might be enough to cause fatal kidney failure.

1. Five
   Three
2. Six
   Twelve

The whole of New York City is made up of five boroughs, including Manhattan, Queens, The Bronx, Staten Island and Brooklyn. As a whole, the city of New York has over 8.6 million residents.

1. Rocks
   Insects
2. Fungi
   Viruses

If you were to ask a mycologist what they were studying, their response would involve some sort of fungus. Mycology is the science of fungi, and it takes a degree in microbiology to explore the field on an advanced level.

1. Five feet
   Three feet
2. Two feet
   Four feet

At its very center, where it sags most, the net marking the middle line on a tennis court stands 36 inches, or three feet, in height. At the poles, the net height is three feet, six inches.

1. 8-10
   12-16
2. 18-22
   3-7

Perhaps one of the sleepiest animals on the planet, the common house cat sleeps between 12 and 16 hours per day. Humans average six to eight hours, and dogs average 12 to 14 hours. Cats clearly take the sleeping title, but not by much!

1. United States
   England
2. Russia
   China

While the United States, India, Japan and Russia use fair amounts of electricity, China has the distinction of using the most. It is easy to see why China is also the largest consumer of coal, followed by the United States.

1. To stay warm
   To fend off predators
2. To stay together
   To avoid loneliness

Seeing sleeping sea otters holding hands while they sleep might look adorable, but it serves a much deeper purpose. In order to avoid being carried away by the tide, sea otters hold hands to keep one another with the rest of the raft.

1. "Wheel of Fortune"
   "The Price Is Right"
2. "Let's Make a Deal"
   "Jeopardy!"

Originally aired in 1956, "The Price Is Right" is considered to be the longest-running game show on television. Although the show has had two breaks, the current version is hosted by Drew Carey.

1. Dollar
   Euro
2. Pound
   Peso

The British pound might soon be a thing of the past, but it has held strong for over 1,200 years. While most of Europe is now using the Euro, Brexit-bound United Kingdom still uses the ancient currency.

1. April
   September
2. March
   October

When the world was operating on the Julian calendar, March was the first month of the year. In 1752 Britain adopted the Gregorian calendar, and the first month of the year became January. In addition, they lost some days, declaring that September 3, 1752, should be September 14, 1752 instead.

1. Tom Hanks
   Brad Pitt
2. Sean Connery
   Tim Robbins

Before Tim Robbins was cast as Andy DuFresne in 1994's "The Shawshank Redemption," Tom Hanks was the actor that producers wanted for the role. Hanks turned down the role, however, because he was busy filming "Forrest Gump."

1. Genesis
   Revelations
2. Leviticus
   Psalms

With 150 chapters and 2,461 verses in the book of Psalms, it carries the title of the longest book in the Bible. If you wanted to read the shortest book, you would read Obadiah. It only has 21 verses.

1. "Of Mice and Men"
   "Curious George"
2. "The Giving Tree"
   "Everybody Poops"

As Tom Hanks navigates the world in the movie "Forrest Gump," his character can often be seen carrying a suitcase. Along with a ping pong paddle, some toothpaste and extra socks, Forrest also carries around a "Curious George" book.

1. "Cats"
   "Phantom of the Opera"
2. "Evita"
   "Jesus Christ Superstar"

After a successful run on Broadway, "Jesus Christ Superstar" hit movie theaters in 1973. With a budget of only $3.5 million, the film grossed nearly $25 million at the box office, surprising everyone involved.

1. Cancer
   Scorpio
2. Leo
   Virgo

In the astrological zodiac, there are twelve signs, split into triplicities based on the four elements of earth, air, fire and water. Along with Taurus and Capricorn, Virgo is considered to be an earth sign.

1. Tick and Tat
   Gustav and Leo
2. Jaq and Gus
   Perry and Mason

Once released in 1950, Disney's "Cinderella" became an instant classic. When Cinderella is in need, she turns to two mice named Jaq and Gus to help. Although Gus' name is really Octavius, Cinderella calls him Gus for short.

1. Rhumba
   Pride
2. School
   Den

Encountering one rattlesnake is quite jarring, but encountering a rhumba of them is the stuff of nightmares. Rattlesnakes do not hibernate during the winter, but they do seek shelter and become lethargic. Their inactivity in cold weather is called "brumation," not hibernation.

1. Love
   Good fortune
2. Competitiveness
   Anger

If you wanted to propose to someone in Ancient Greece, it was as simple as throwing an apple at them. You've heard the phrase "apple of my eye," but now you know what it really means. When a man wanted a wife back then, he simply chucked a whole apple her way.

1. Earth
   Jupiter
2. Mercury
   Mars

At a height of 15.5 miles, Olympus Mons is more than double the height of Mount Everest. Found on Mars, the giant mountain is an active volcano. With no plate tectonics on Mars, the volcano continues to grow.

1. Julia Roberts
   Susan Sarandon
2. Reese Witherspoon
   Angela Bassett

In 2007's "Enchanted," Susan Sarandon put all the other wicked stepmothers in Disney's arsenal to the test, flawlessly playing Queen Narissa. Sarandon later admitted that it was one of her very favorite roles.

1. Bad singing
   Musical entertainment
2. Empty orchestra
   Lip syncing

Before the word "karaoke" was coined, the machine that plays music and allows people to sing over it was invented in 1971. It wasn't until a machine was used to fill in for an orchestra that the term "karaoke," or "empty orchestra," was coined.

1. "Cinderella"
   "Snow White and the Seven Dwarfs"
2. "The Three Little Pigs"
   "Sleeping Beauty"

In 1979, Walt Disney's "Snow White and the Seven Dwarfs" made its debut on Broadway. Based on the classic 1937 film, the show starred Mary Jo Salerno as the sleepy princess.

1. Timber rattlesnake
   King cobra
2. Copperhead
   Water moccasin

Snakes are well known for congregating in dens, but only the king cobra can make a nest. Because it can lay up to 40 eggs at a time, it creates a nest with plant matter to protect its delicate offspring.

1. New York, New York
   London, England
2. Milan, Italy
   Barcelona, Spain

First built as the gateway to the Paris Exposition in 1889, the Eiffel Tower was supposed to be moved and permanently placed in Barcelona, Spain. After being rejected by the Spanish government, the tower was left to stand in its current position.

1. "Like a Virgin"
   "Papa Don't Preach"
2. "Everybody"
   "Get Into the Groove"

When Madonna hit the music scene in 1982, "Everybody" was her first music video. However, 1984's "Borderline" was the first to become popular on MTV. Now with more than 75 singles under her belt, she remains one of the world's top-selling artists.