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Cobalt: Essential for Batteries and Bright Blues
science.howstuffworks.com/environmental/earth/geology/cobalt.htm
Cobalt is associated with the color blue, but it's so needed for rechargeable batteries that the U.S. put it on the list of minerals it can't live without.
Can you identify these abandoned places?
play.howstuffworks.com/quiz/can-you-identify-these-abandoned-places
Abandoned places are equal parts creepy and fascinating. While they offer a tantalizing look at places frozen in time, they also leave you wondering just how a place that was once so full of life could be left to decay, its buildings surrendered to Mother Nature. Take our quiz to see how much you know about some of the most intriguing abandoned places on the planet.
Name These Gemstones From One Image in 7 Minutes
play.howstuffworks.com/quiz/93-people-cant-guess-these-gemstones-just-one-image-can-you
How well do you know gemstones? These gems come in a vast sea of colors, properties, and characteristics! Can you identify them?? Test your memory on nature's finest creations, while learning facts your might not have otherwise known! Start the challenge now with this quiz!
The North American Geography Quiz
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North America encompasses huge expanses of water and land. What do you know about this area's people, geology and climate? Take this quiz to find out.
How many state mottos, nicknames and slogans do you know?
play.howstuffworks.com/quiz/how-many-state-mottos-nicknames-slogans-do-you-know
All of the 50 states (plus the District of Columbia) have a state motto (some adopted by an official state legislature, while others are adopted by the residents), And most also have a state nickname and a state slogan, too -- and sometimes, more than one per state. You might know your state's from its flag, seal or license plates. But how much do you know about the other 49 states?
Do You Know the Nicknames of All 50 US States?
play.howstuffworks.com/quiz/do-you-know-the-nicknames-of-all-50-us-states
Ever traveled to the Peace Garden State? Know where to find the Old Line State? Put on your U.S. traveling pants as you navigate from the Evergreen State to the Sunshine State in this state nickname quiz!
Could You Pass This Canadian Geography Quiz?
play.howstuffworks.com/quiz/could-you-pass-this-canadian-geography-quiz
If you've traveled around the country, or just know your stuff about Canada, you've found the right quiz. You live here, but how well do you really know the geography of your country? Find out by taking a trip from BC to Newfoundland on this quiz!
Can You Guess All 50 States From an Image Of Their Outline?
Did you get an A in your geography class? Do you know the state mottos and famous landmarks that make each state unique? Prove it by challenging yourself with this quiz!
How Labor Scabs Work
money.howstuffworks.com/labor-scab.htm
Labor scabs fill jobs when union workers go on strike. Learn more about labor scabs and labor strikes.
10 Innovations in Water Purification
science.howstuffworks.com/environmental/green-tech/sustainable/10-innovations-water-purification.htm
As far back as 1500 B.C.E., people were trying to purify water to make it drinkable. And we're still at it. Today inventors use tools as simple as clay and as sophisticated as carbon nanotubes to bring clean water to the world.