In this video Paul Andersen shows conceptual thinking in a mini-lesson on proportional relationships. TERMS Quantities - the amount (or number) of a thing Proportional relationship - relation of one dataset to another dataset Directly -...

In this video Paul Andersen explains how energy can enter and leave a system. The amount of energy a substance can receive through heating or lose through cooling is measured using the specific heat capacity. Phase changing energy from...

Is Glass a Liquid?

Earth had a climate long before we showed up and started noticing it and it's influenced by a whole series of cycles that have been churning along for hundreds of millions of years. In most cases those cycles will continue long after...

Have you ever suffered from exertional heat stroke? This condition is caused by intense activity in the heat and is one of the top three killers of athletes and soldiers in training. Douglas J. Casa explains heat stroke's tremendous...

This video explores the fascinating processes of heating and cooling. Vivid, real-world examples help students understand the difference between changes that can be reversed and those that cannot be reversed. In the activity students...

A mysterious patch in the Pacific Ocean is defying all climate models - it is inexplicably cooling while the rest of the world is warming. Stretching off the west coast of Ecuador, this “cold tongue” challenges what we know about...

Howcast - Learn about cooling, a process used in brewing beer at home, from home brewer Chris Cuzme in this Howcast video.

Howcast - Learn about boiling, a process used in brewing beer at home, from home brewer Chris Cuzme in this Howcast video.

Howcast - Learn how to make a cucumber facial mask from licensed esthetician Joanna Vargas in this skin care video from Howcast.

Howcast - Learn how to placate someone you've tricked out of money with this Howcast video.

Howcast -Learn if you can do glassblowing at home from glassblower Todd Hansen in this Howcast video.

Lower your A/C bills by making sure your system is operating at peak efficiency.

Discover how a family in Culver City created an eco-friendly home that blends modern design with sustainability. Learn about the use of wood and steel, energy-efficient windows, and the integration of natural light and materials. See...

We’ve all heard that we should keep global climate change under 2 degrees of warming, but did you know that there are many places around the globe that have already surpassed that? Some places around the globe are experiencing extreme...

With unprecedented heat waves and record-breaking global temperatures, it’s hard to believe that there might be a place on earth that has actually COOLED since the industrial revolution.

Glass is made by heating sand (mostly composed of silicon dioxide) until it melts and turns into a liquid at a high temperature of around 1700° Celsius. When the molten sand is allowed to cool, it becomes an amorphous solid, featuring...

Producing many identical copies of a DNA sequence, by laboratory processes, such as the polymerase chain reaction.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning...

The most widely accepted theory for the origin and development of our Universe.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

The surface layer of a rocky planet or other astronomical body, usually chemically distinct from the mantle beneath it.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using...

The formation of solid crystals from a solution, or a cooling liquid or gas.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....

A small to medium sized star late in its life, when it has used up its hydrogen in nuclear fusion and starts burning heavier elements.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60...

A small, extremely dense star characterised by high temperature and luminosity, no longer capable of nuclear fusion.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning...

The Sun is dying, getting hotter as it goes. Eventually it will shrink into a black dwarf, but life will have vanished long before.



Physics - Our Solar System - Learni

ng Points.

The Sun is 5 billion years...