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....

Proteins are at the root of virtually all bodily functions, from growth to metabolism to transporting oxygen around the body. Learn how your body makes or ingests all the protein you need. Chemistry - Chemical Industries - Learning...

The discovery of Titan's atmosphere excited scientists, who believe it could hold the key to life on Earth. Physics - UniverseLearning Points. Titan is the only moon in the Solar System with a dense atmosphere. Titan's atmosphere is 98%...

Potassium nitrate is a natural substance found in your food, or in an exploding firework. What makes it so versatile? Chemistry - Chemical Industries - Learning Points. Potassium nitrate preserves our food and is a component of...

Find out more about the range of toxins in cigarettes and the serious damage they can cause to smoker's lungs. Biology - Human Body - Learning Points. Cigarette smoke damages the lungs. The chemicals in cigarettes irritate the lung...

An organic compound containing nitrogen that plays an important role in animal metabolism, and is excreted in the urine of mammals. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...

Two or more atoms held strongly together by covalent bonds. 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...

We look at how different materials change when they are exposed to liquid nitrogen. Flowers become frozen and stiff and the petals snap. A banana hardens and is strong enough to be used as a hammer and a squash ball becomes very brittle...

We investigate the properties of two types of gas bubbles: methane gas bubbles and bubbles of the gas we breathe out. The air-filled bubbles sink and we are unable to set them alight, while the methane bubbles float upwards and are...

Discover that altering the number of successful collisions between particles is key to changing the rate of chemical reactions. How this can be manipulated? Chemistry - ReactionsLearning Points. New substances are made when particles...

How non-metal elements combine by covalent bonds to form compounds. Chemistry - Atoms And Bonding - Learning Points. Covalent bonds occur between non-metal atoms. The number of bonds depends on how many electrons are in the outer shell....

The potentially deadly threat changes in pressure pose for divers. What happens when a diver experiences the bends, and how can they be saved? Physics - Forces - Learning Points. The Bends is decompression sickness, which affects divers...

A look at the ancient preserved bodies that forensic scientists can examine in order to gain a better understanding of our ancient past. Chemistry - Atoms And Bonding - Learning Points. Forensic scientists can help us understand our...

We lower a helium-filled balloon into liquid nitrogen to see how the change in temperature affects its volume. When it hits the cool liquid nitrogen, the gas inside contracts and the volume of the balloon decreases. When it is removed...

A balloon is dipped in liquid nitrogen ... what happens next?
<

br/>

Material processes - Changing materials - Expansion
a

nd conduction


A Twig Tidbit Film - What happens next? A short section of film is...

Six gas molecules are shown on screen ... can you spot the molecules that make up air?
<

br/>

Material processes - Solids, liquids and gases - Characte
r

istics of air />

Learning Points
Oxygen,...

You may not think about it much, but air is everywhere and it is essential to life.
<

br/>

Material processes - Solids, liquids and gases - Characte
r

istics of air />

Learning Points
Air is a...

Discover the millions of microorganisms in soil.
<

br/>

Material processes - Classifying ma
t

erials - Soil />

Learning Points
Soil is a mixture of rock partic
l

es, organic matter, air and...

Never draw a Lewis Structure wrong again! In this video, we’ll show you 4 simple steps to master the art of drawing Lewis Structures—an essential skill in chemistry that helps explain molecular behavior and the chemical and physical...

Understanding Intermolecular Forces (IMFs) is essential to success in chemistry and being able to discuss various properties we see in different molecules. In this video we cover the big three IMFs - hydrogen bonding, dipole dipole...

When writing resonance structures, it's essential to follow certain rules: only electrons move, not atoms; all structures must have valid bonding; and charges should be minimized. These guidelines ensure resonance structures accurately...

Resonance requires specific conditions for electron delocalization. The molecule must have a conjugated system with alternating single and double bonds, and atoms must be capable of sharing electrons. Acetamide and the carbonate ion are...

The inductive effect plays a significant role in determining a molecule's basicity. Electron-withdrawing groups decrease basicity by pulling electron density away from the nitrogen or oxygen atom, weakening its ability to accept protons....

In this video, we explore the leading factors contributing to the enhanced greenhouse effect and its implications for climate change and sustainability. Discover how greenhouse gases like carbon dioxide, methane, and nitrous oxide trap...