Wi-Fi signals can penetrate walls using radio waves in the frequency range of 2.4GHz or 5GHz. These wavelengths are small enough to pass through cracks and openings in walls. WiFi signals also reflect off objects, allowing the signals to...

Coefficient of restitution: What is it? How is it related to the general bounciness of balls and other objects? Here's a quick, simple and basic explanation of the coefficient of restitution for kids and laymen. Basketballs bounce a lot,...

Yes, fire can burn without oxygen. While oxygen is an important oxidizing agent for combustion, it is not the only one. There are alternative oxidizers such as chlorine, fluorine, and bromine that can also support burning. Furthermore,...

In this video, children are encouraged to prioritize meaningful experiences and relationships over material possessions. The teacher emphasizes the importance of spending time with family, friends, and pets, as well as engaging in...

GLASGOW SCIENCE CENTRE TOWER OF THE MANY LANDMARK PROJECTS CELEBRATING THE NEW MILLENNIUM, A SCOTTISH CITY PRODUCED ONE THAT WAS UNIQUE. THE TOWER AT THE GLASGOW SCIENCE CENTRE IS THE WORLD'S FIRST CAPABLE OF REVOLVING THROUGH...

In physics, the normal is a line perpendicular to a surface.
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Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...

The transfer of heat in a fluid by movement of the fluid itself.
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Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...

In materials science, the substrate is the surface on which a coating is deposited.
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Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A measurement related to the average kinetic energy of the particles contained in a system.
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Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A transparent material shaped to refract light, such that it converges or diverges from a single point.
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Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and...

Material that has a definite chemical composition and distinct properties.
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Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....

A material whose electrical conductivity is in between that of a conductor and an insulator.
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Key scientific terms defined in just 60 seconds using stunning images and concise...

A scientific dating method widely used in archaeology to estimate the age of any organic material, such as wood, seeds, or animal remains.
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Or reagent, the material that is consumed in a chemical reaction to create new products.
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Elasticity is the property of a material that affects how easily it will return to its original shape after an external force is applied.
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A substance with properties that arise from extremely small structures, of the order of 1 to 100 nanometres.
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The process by which a cell can take in material from its environment by first engulfing it with its cell membrane.
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The complete reflection of a light ray within a transparent material.
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Sounds can change as they move from one medium to another. Under the right circumstances the effect is surprising and extreme. Physics - Waves - Learning Points. Sound is a wave that is created by vibrating objects. Every object has a...

A closer look at the three key processes that shape our coasts. What are they and what effects do they have? Earth Science - Geology - Learning Points. Our coastlines are constantly being re-shaped by three key processes. Erosion -...

The explosive reactions and forces, from gravity to nuclear fsion, which formed our Solar System. Physics - Our Solar System - Learning Points. Our Solar System is the region of space which falls within the gravitational influence of our...

How comets change as they journey around the Sun, what are they made of and where are they found? Physics - Universe - Learning Points. Comets formed from dust and ice particles when the Solar System was very young. There are at least a...

Coastal erosion produces beautiful beaches and some rather unusual land formations, from spits to stacks, mud flats to salt marshes. Earth Science - Geology - Learning Points. Cliffs are formed when destructive waves attack the bottom of...

When a group of scientists claimed they had achieved nuclear fusion, the discovery became one of the most controversial of the 20th century. What is fusion, and what role does heat play in it? Physics - Energy And Radioactivity -...