This video is explaining how astronaut food works for kids.

An Introduction to Solid State A solid is a form of matter with rigidity, a definite shape, and a definite volume. It differs from gases and liquids, which have fluidity determined by the relative free motion of their molecules. Solids...

Exploring the Core: Basic Solid Properties

Solids diffuse slowly compared to liquids and gases, as constituent particles are closely packed, allowing little space for movement. They have a higher density than gases and liquids....

Discharge tube experiments are crucial in understanding atomic structure and the discovery of subatomic particles. These experiments involve the interaction of electricity with gases at low pressures, observing cathode rays and their...

Dr. Boyd gives the physics definition of density, then walks you through a demonstration to show how liquids with different densities can form multiple liquid layers in a container.

Which liquid will dissolve the Peppermint Candy Canes the fastest? Follow Dr. Boyd’s explanation to set up your experiment. Just remember to come up with your own hypothesis before you start the experiment. Once you’ve come up with your...

In part 2 of a 3 part discussion on fluid diffusion, Dr. Boyd explains and demonstrates the effect of temperature on diffusion. Minute 0:30 – Introduction Minute 0:41 – What you need Minute 0:54 – Explanation Minute 1:47 – Safety Minute...

In part 1 of a 2 part discussion on surface tension, Dr. Boyd give a simple and easy to follow explanation and demonstration of the effect liquid dish soap has on the surface tension of water. Minute 0:30 – Introduction Minute 0:45 –...

It takes a very steady hand to execute the "shot glass on shot glass" maneuver Dr. Boyd pulls off...twice. Find out how this helps explain fluid diffusion and fluid density in this cool video! Minute 0:30 – Introduction Minute 0:52 –...

In part 2 of a two-part discussion on surface tension, Dr. Boyd uses dish soap to decrease the surface tension of milk, which causes the milk to make swirls of color from food dye. Minute 0:30 – Brief Review Minute 0:57 – What you need...

Did you know raisins can ‘dance?’ Find out how with these scientific demonstrations. 0:00 – Introduction 0:17 – What you’ll need 0:36 – The science behind soda pop 1:26 – Experimental explanation 2:09 – Safety discussion 2:56 –...

An atom or molecule that has gained or lost one or more electrons, and so has an electrical charge.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise...

A way of separating liquids that have different boiling points from a mixture.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....

In digestion, absorption is the movement of nutrients and other food chemicals from the gut into the bloodstream, which takes place in the small intestine.
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A Twig Science
Glossary Film.
Key scientific terms...

A substance which turns easily to a vapour at normal temperatures and pressures.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

Easily ignited, able to catch fire easily. Flammable materials may be solids, liquids, or gases.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise...

Chains of carbon atoms, especially in fats and oils, that contain two or more double bonds between carbon atoms.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning...

A substance that is able to flow freely.
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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 Films reinforce...

The cohesive force that occurs at the surface of a liquid, due to the attractive forces between molecules.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and...

Discover how different materials react to heat, and why this can be both useful and dangerous. Physics - Energy And Radioactivity - Learning Points. Temperature affects the size and shape of an object due to the expansion and contraction...

Water can either be a solid, a liquid or a gas. How does matter change state? Chemistry - Atoms And Bonding - Learning Points. Ice, liquid water and steam all consist of exactly the same molecules. Evaporation occurs when the temperature...

Learn how the industrial process of fractional distillation transforms crude oil into a variety of products, from plane fuel to road surfacing. Chemistry - Chemical Industries - Learning Points. Extraction of crude oil from Fractional...

What is the difference between solids, liquids and gases? How does each state behave? Chemistry - Atoms And Bonding - Learning Points. The kinetic theory of matter states that particles are in constant motion and there are forces of...

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...