In this video Paul Andersen explains how chemical differs from physical change. In the laboratory macroscopic observations are used to infer changes at the particulate level. Evidence for chemical change include gas production, change...

Did you know that the fishier a fish smells, the longer it’s been out of the water? This is due to a chemical called trimethylamine, which is an amine, the class of organic compounds we’re discussing in this episode! Although they tend...

At this moment, three hundred million women across the planet are experiencing the same thing: a period. The monthly menstrual cycle that gives rise to the period is a reality that most women on Earth will go through in their lives. But...

Our skin is the largest organ in our bodies, with a surface area of about 20 square feet in adults. When we are cut or wounded, our skin begins to repair itself through a complex, well-coordinated process. Sarthak Sinha takes us past the...

In this video Paul Andersen explains how plate tectonics explains the large-scale system interactions on our planet. Large plates float on the mantle and interact to form the major landforms on the planet. Evidence for plate tectonics...

Hank describes three of the whackest weather phenomena on Earth: atmospheric rivers, fire tornadoes, and ball lightning. Super interesting and super weird.

Did you know that gold is extraterrestrial? Instead of arising from our planet's rocky crust, it was actually cooked up in space and is present on Earth because of cataclysmic stellar explosions called supernovae. CERN Scientist David...

Did you know that Polymers save the lives of Elephants? Well, now you do! The world of Polymers is so amazingly integrated into our daily lives that we sometimes forget how amazing they are. Here, Hank talks about how they were developed...

What are air currents? Air currents are like rivers of wind caused by areas of high and low pressure.The air above the land is warmer and less dense, so it rises. The air over the water is cooler and heavier. The cool air rushes in...

Paul Andersen explains how polymers are formed from monomers. He describes how carbohydrates, protein and nucleic acids are created through condensation reactions. He also explains how these macromolecules are broken down through the...

Do you love to look at a big, beautiful full moon in the night sky? So do Jessi and Squeaks! But how did the moon get up there? And what is it made of?

Howcast - Learn what causes gallstones from gastroenterologist Lisa Ganjhu, M.D. in this Howcast video about stomach problems and digestive disorders.

The beanbag chair: where practicality and ergonomics meet. Make your own with these tips.

Pupil outcome: I can correctly form the four joins. Key learning points: - Cursive handwriting involves joining letters together without lifting your pencil. - The first join connects from the baseline to the x-height line. - The second...

Over 80% of Australia’s wildlife is found nowhere else on Earth, a result of its ancient separation from Antarctica during the breakup of the supercontinent Gondwana. As Australia drifted northward into warmer, drier climates, its...

What is the formation of a Sale and Lease Contract?

What is the Punctuated Equilibrium Model? “Punctuated equilibrium is the idea that evolution occurs in spurts instead of following the slow, but steady path that Darwin suggested. Long periods of stasis with little activity in terms of...

State Law and Corporate Governance

What is the difference between Common shares and Preferred Shares? The main difference between preferred and common stock is that preferred stock gives no voting rights to shareholders while common stock does. Preferred shareholders have...

What ar the 4 Stages of Group Development? Psychologist Bruce Tuckman described how teams move through stages known as forming, storming, norming, and performing, and adjourning (or mourning). You can use Tuckman's model to help your...

Carbon-based molecules are the basis of life as we know it. Molecules like lipids, proteins, nucleic acids, and carbohydrates that make up all living things have one thing in common - carbon.

The discoveries James Webb has made beyond the visible light spectrum.

Snowflakes come in a seemingly endless variety of shapes and sizes. Two factors play key roles in determining the shape of a snowflake: temperature and humidity. Kenneth Libbrecht, Professor of Physics at the California Institute of...

When a solid changes directly into a gas, without passing through a liquid stage.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...