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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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Could You Dig a Tunnel Right Through the Center of Earth?
Let's say you have a lunch date to make – and it's on the other side of the planet. Wouldn't it be convenient to pop down a hole through Earth's innards? But what would really happen if you did?
Is it possible to generate electricity directly from heat?
Is it possible to generate electricity directly from heat? Thermocouples do it, with no moving parts.
How does a seismograph work? What is the Richter scale?
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.
How many sheets of paper can be produced from a single tree?
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.
How can ozone be both good and bad?
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?
What is activated charcoal and why is it used in filters?
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?
How does gravity work?
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.
What Are All the Different Ways to Store Energy Besides Using Rechargeable Batteries?
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!
Why does smoke come from a fire?
Let's say you have a nice fire going, and it's reduced down to a pit of hot "glowing embers." If you now toss a piece of wood, or even a sheet of paper, onto this fire, you see a huge puff of smoke as it heats up.
What is an oscilloscope used to measure?
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.
How do they measure sea level?
How do they measure "sea level"? Is it the average of the tides? And is the sea level actually rising or not?
How do the streetlights turn on automatically at night?
On the Flintstones, a small bird sits inside the light and turns it on every night before he goes to bed. In a modern streetlight, a small circuit replaces the bird.
How The Nature Conservancy Works
A fascinating article that describes the work of The Nature Conservancy and the benefits of its conservation projects to our environment and ecology!
How Solar Cells Work
You've probably seen solar cells on calculators, call boxes, road signs, homes and businesses. But how do solar cells work?
Inside a Power-Cube Transformer
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!
How Moissanite Jewels Work
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!
How Power Grids Work
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.
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