North American Geography
Colleges/Universities
Vertebrates
19th Century Inventions
Empires
100

Mountain range stretching from New Mexico to British Colombia

Rocky Mountains

100

Notable college in Columbus, Ohio. 

Ohio State University

100

Largest Vertebrate on Earth

Blue Whale

100

Patented by Alexander Graham Bell, this invention allowed people to instantly communicate over large distances. 

Telephone

100

At its peak, this massive ancient empire spread from modern day Great Britain to Iraq. 

Roman Empire

200
Shallowest of the Great Lakes. 

Lake Erie

200

Notable university whose sports teams are known as the Tar Heels.

University of North Carolina

200

Unlike most mammals, this group, including Kangaroos and Koalas, gives birth to tiny, underdeveloped young that finish growing inside a pouch.

Marsupials

200

In 1879, Thomas Edison famously perfected a long-lasting, practical commercial version of this everyday item. 

Light Bulb 

200

Largest, contiguous land empire ever, reaching its peak in the late Thirteen Hundreds. 

Mongol Empire

300

Largest city in Canada. 

Toronto

300

The only Ivy League college in the state of New Hampshire

Dartmouth

300

This organ, found only in fish, fill with gas to control buoyancy. 

Swim Bladder. 

300

Patented by Alfred Nobel in 1867, this highly explosive material revolutionized construction, mining, and warfare.

Dynamite

300

Empire famous for its hanging gardens, now one of the 7 wonders of the ancient world. 

Babylonian Empire

400

Deepest lake in the United States. 

Crater Lake

400

Largest university in the United States by in person enrollment. 

Texas A&M

400

This protective protein makes up feathers, scales, and the claws/hair of mammals. 

Keratin

400

This inventor created a system of dots and dashes that allowed messages to be sent over telegraph wires.

Samuel Morse

400

This empire, reigning from 250 to 900 CE, is known for its stepped pyramids and accurate astronomical calendars. 

Mayan Empire

500

Largest state in Mexico. 

Chihuahua 

500

First institution of higher learning in the United States to admit women. 

Oberlin College

500

Aside from the Platypus, this is the only mammal to lay eggs. 

Echidna

500

In 1839, Charles Goodyear discovered the process of "vulcanization," which made this durable and heat-resistant.

Rubber

500

The Aztec capital of Tenochtitlan, an island in Lake Texcoco, is now the site of this modern day city.

Mexico City