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Lunar Cycles Quiz

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William Shakespeare warned us "Do not swear by the moon, for she changes constantly." Sound advice, right? Well, maybe. Sure, she changes, but her phases remain quite reliable. Take the following quiz to see what I mean!

How Recessions Work

money.howstuffworks.com/recession.htm

What goes up must come down: Periodic recessions are a natural part of any nation's economic cycle. Find out exactly what a recession is, how it happens and what can turn it around.

How Slot Machines Work

entertainment.howstuffworks.com/slot-machine.htm

Slot machines are a popular form of gambling. Learn about modern slot machines and old mechanical models and find out the odds of winning on slot machines.

How Swimming Pools Work

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Swimming pools provide a refreshing way to cool off on a hot summer day. Check out the different types of swimming pools and learn about the filtration process.

How GMs Hy-wire Works

auto.howstuffworks.com/hy-wire.htm

What's a car without an engine? A GM Hy-wire. There's no combustion, no linkages, and it has driver controls that work like a video-game joystick. See what you could be driving in the future.

Where Is the Hubble Telescope and How Does It Work?

science.howstuffworks.com/hubble.htm

The Hubble Space Telescope is one of the most amazing machines in orbit right now. Learn more about the Hubble Space Telescope and how it works.

How Maglev Trains Work

science.howstuffworks.com/transport/engines-equipment/maglev-train.htm

Magnetic levitation trains are becoming a popular transportation topic all around the globe. Learn about electromagnetic suspension, the most popular type of maglev train.

How Light Microscopes Work

science.howstuffworks.com/light-microscope.htm

The human eye misses a lot -- enter the incredible world of the microscopic! Explore how a light microscope works.

How will landing on Mars work?

science.howstuffworks.com/landing-on-mars.htm

Landing on Mars will be one of the most dangerous and rewarding space missions. Learn how landing on Mars will further our understanding of space.

How Air Brakes Work

auto.howstuffworks.com/auto-parts/brakes/brake-types/air-brake.htm

Air brakes aim to stop trucks, trains and buses from crashing. Learn why air brakes, not hydraulic brakes, slow these modes of transportation down.

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