Environmental Science

The environment is truly a thing of beauty and should be protected whenever possible. What can we do to save the environment, and what new technology is available to help us?

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An oscilloscope measures the voltage and frequency of an electric signal. A machine uses "sweeps" and and an input signal. See how it all comes together.

Is it possible to generate electricity directly from heat? Thermocouples do it, with no moving parts.

A seismograph can accurately measure the movement of the Earth during a quake. How does a seismograph work, though, and what is the Richter scale that is associated with earthquakes? Learn the answers to these questions in this article.

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We know that paper comes from trees, but just how much does it take? Let's do the math and figure out how much paper your average tree can be made into.

During the summer I am always hearing about ozone warnings in my city. This ozone is bad. But then I hear about the ozone layer, which is good. How can ozone be both good and bad?

Charcoal is carbon. Activated charcoal is charcoal that has been treated with oxygen to open up millions of tiny pores between the carbon atoms. What does this have to do with its absorbancy?

Gravity is a force that we experience every minute of our lives, but hardly notice or give a passing thought to in our daily routines. Have you ever wondered what gravity is and how it works? Learn about the force of gravity in this article.

By Julia Layton

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One way to store energy is to use a battery, like a lead-acid battery or a nickel-cadmium battery, but are there lighter or longer-lasting ways to store energy? There must be a better way!

A fascinating article that describes the work of The Nature Conservancy and the benefits of its conservation projects to our environment and ecology!

You've probably seen solar cells on calculators, call boxes, road signs, homes and businesses. But how do solar cells work?

By Jessika Toothman & Scott Aldous

You've probably never noticed how many of these you use everyday, but HowStuffWorks took the time to count them and take them apart to see what's inside!

By Marshall Brain

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Diamonds are beautiful and popular - but not everyone can afford these gems. While man-made versions are less expensive, most lack the luster and brilliance of the real thing, except moissanite. See how it compares!

By Melissa Russell-Ausley

Electrical power is a little bit like the air you breathe: You don't really think about it until it is missing. There are good reasons the power grid distribution system works the way it does, though it can lead to some big problems.

By Marshall Brain & Dave Roos