How Long To Fall Through the Earth?

The Crab Nebula is one of the most studied things in the sky, but it took glimpses through various wavelengths of the electromagnetic spectrum to get a full picture of what’s hiding inside!

All along the east coast of the United States there are thousands of oval shaped pock marks, and scientists think they have a clue as to how they got there.

How Long To Fall Through the Earth?

Paul Andersen explains how organisms regulate their internal osmolarity or not. He starts with a brief description of osmosis and why it is important for animal cell to be surrounded by an isotonic solution. He then explains how...

Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee.

There's a concept that's crucial to chemistry and physics. It helps explain why physical processes go one way and not the other: why ice melts, why cream spreads in coffee, why air leaks out of a punctured tire. It's entropy, and it's...

Concentrations of solute in a solvent.

Howcast - Learn about single cask whiskey, aka single barrel whiskey, from the experts at NYC's Rye House in this Howcast video.

Howcast - Learn how to green your beauty routine with this Howcast video featuring Alegre of Green and Greener.

Howcast - Learn which organic skin care product is worth the splurge from natural beauty products expert Spirit Demerson in this Howcast beauty video.

Why didn't we ever think of this before? This dead-simple trick lets you get the most out of your Keurig with no added hassle.

Valence Bond (VB) theory explains how chemical bonds form through the overlap of atomic orbitals, where electron pairs are shared between atoms. The key concepts include: Atomic Orbital Overlap: Bonds form when atomic orbitals from...

The middle portion of the Earth's interior, between the outer crust and the core.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A strong acid is one that is fully ionised in solution.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...

Learn how surface area can affect the amount of pressure exerted, and why this is useful in life? Physics - Forces - Learning Points. Pressure is the amount of force acting on a set area. Pressure is measured in pascals. Pressure can be...

Find out how chromatography can be used to create the chemical 'colour fingerprint' of a substance. What are the two chromatography methods and how are they used to solve crimes? Chemistry - Atoms And Bonding - Learning Points....

The properties of strong acids and alkalis can be extremely harmful. Where do we find them, and how can we tell how acidic or alkaline a substance is? Chemistry - Reactions - Learning Points. Bases neutralise acids, and if a base...

We use a plumb line and hook to find the centre of gravity of an irregularly shaped piece of card. A hole is punched in the card and it is suspended from the hook. A plumb line is used to let us draw the vertical line under the hole on...

Salt is found in the oceans and Earth's surface. How do we collect this salt and separate it from the materials it is mixed with? Chemistry - Atoms And Bonding - Learning Points. Salt is found in oceans, lakes and underground rock beds....

The movement of water from a less concentrated solution to a more concentrated one, through a partially permeable membrane. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...

Explore the fascinating transformation of portraiture from traditional methods to cutting-edge 3D technology. Journey with Mac Lesggy as he discovers how modern techniques capture and immortalize human likenesses in crystal blocks,...

Uncover the fascinating world of skin genetics with a deep dive into how freckles form and why they're hereditary, and explore the nature of moles and their implications for health. Featuring expert dermatological insights, this video...

One of the most confusing points with acids is the difference between strength and concentration. This video covers exactly what strong vs weak means and explains what the pH scale really represents. This video is suitable for: - Higher...