Science
American History
Breakthrough Inventions
Famous Speeches
Animals
100

This is the chemical symbol for water 

H20

100

This document declared the independence of the 13 American colonies from Britain

The Declaration of Independence 

100

This invention by Alexander Graham Bell was patented in 1876.

The telephone 

100

In 1963, Martin Luther King Jr delivered this speech during the March on Washington for jobs and freedom at the Lincoln Memorial, calling for civil and economic rights and an end to racism in the United States, known for its repeated phrase envisioning equality. 

I have a dream

100

This is the common name for Orcinus Orca

Killer Whale

200

Newton is famous for this law of motion 

law of universal gravitation

200

He was the first president of the United States 

George Washington 

200

This man invented the first practical incandescent light bulb 

Thomas Edison 

200

Delivered by Abraham Lincoln during the American Civil War, this speech is known for the phrase "government of the people, by the people, for the people." 

Gettysburg Adress 

200

This is the only mammal born with horns 

Giraffe 

300

The study of life is known as this

Biology

300

This war was fought between the North and South regions of the United States

The Civil War

300

Known as the father of the computer, he conceptualized the first mechanical computer early in the 19th century. 

Charles Babbage 

300

This British Prime Minister gave a speech in 1940 known for the phrase "We shall fight on the beaches" 

Winston Chruchill 

300

The aardvark comes from this continent

Africa 

400

This is known as the red planet

Mars

400

This purchase doubled the size of the United States in 1803

The Louisiana Purchase 

400

This revolutionary product, released in 2007, reshaped mobile communications and technology. 

The iPhone

400

Given by the U.S. President in 1961, the speech famously urges Americans to "ask not what your country can do for you - ask what you can do for your country". 

John F. Kennedy 

400

This bird's eye is larger than its brain 

Ostrich 

500

Einstein is renowned for this theory

The theory of relativity 

500

The Gettysburg address was delivered by this president. 

Abraham Lincoln 

500

This invention allows us to see the bones inside our body without surgery. 

X-Ray

500

This speech was delivered by Queen Elizabeth II on her 21st Birthday, making a lifelong pledge to her people 

"A life of service" 

500

This ape's name means "man of the forest" in Malaysian

Orangutan