Point A Masterpiece

Point A Masterpiece

Does pointillism really work? Create your own pointy artwork to find out.
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How Light Travels Experiment

How Light Travels Experiment

From Explore Light and Optics!

Scientists know that light travels very quickly. In this experiment, you will discover if light really does travel in a straight line.

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Building Bridges

Building Bridges

From Explore Forces and Motion!

Forces act on everything, even things that are standing still. Engineers need to understand forces when they build structures such as bridges. Let's see how different bridges support the forces that are placed upon them.

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Converting Units

Converting Units

From Chemistry

Chemistry uses many types of measurements. Some of the most common include distance, mass, time, temperature, volume, density, pressure, amount, concentration, energy, velocity, molarity, viscosity, and electric charge. Each of these can be measured in different ways. For example, mass can be measured in pounds, ounces, grams, and kilograms. Because of these differences, chemists must know how to convert measured quantities into SI. The factor-label method allows you to easily convert units from one type...

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On the Straight and Level

On the Straight and Level

From Explore Gravity!

In the introduction you made a plumb bob that used gravity to make sure things are vertical. Now you can make a water level, a tool that uses gravity to make sure things are straight across! The water level works because when water is in a confined space, gravity makes sure the top of it is level.

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