Curated Video
Urban Land Use Models
A look at the Burgess and Hoyt models, and how each explains the layout of urban settlements. Human Geography - Orientation And Settlements - Learning Points. The Burgess Model shows a city's development as a series of concentric rings,...
Curated Video
Ingenhousz's Heat Conductors
We use a metal box holding rods of different materials to test their ability to conduct heat. The box is filled with boiling water and a paperclip is attached to the end of each rod using petroleum jelly. As the heat moves through the...
Curated Video
Discovery of DNA
The story of a race between two teams of scientists in the 1950s - Francis Crick and James Watson, Rosalind Franklin and Maurice Wilkins - desperate to be the first to unlock the molecular structure of DNA. Biology - Cells And DNA -...
Curated Video
What is an Atom?
From our bodies to the oceans and stars, everything is made of millions upon millions of tiny atoms. But what are atoms made of? Chemistry - Atoms And Bonding - Learning Points. The building blocks of all elements are called atoms. Atoms...
Curated Video
Atomic Structure
What does the Periodic Table tell us about the elements, their properties and behaviours? And why does the atomic number define each element? Chemistry - Periodic Table - Learning Points. The structure of the atom reveals why the...
Curated Video
The Cell Membrane
Journey inside the cell to see how the cell membrane acts as both a barrier and an entrance. How does it take in nutrients while keeping out potentially damaging molecules? Biology - Cells And DNA - Learning Points. The cell membrane...
Curated Video
How Do Snowflakes Form?
A blizzard creates a blanket of snow. Look closer and the true beauty of individual snowflakes can be seen. How are different shapes of snowflakes formed and why are they always perfectly symmetrical? Chemistry - Atoms And Bonding -...
Curated Video
An Ancient Olympian
What the discovery of a skeleton over 2,000 years old tells us about the training techniques of ancient olympians. Biology - Human Body - Learning Points. In 1959 the tomb of an ancient Olympian was discovered in Taranto, southern Italy....
Curated Video
Arches
Discover how forces are applied through an arch, and why this makes it the perfect shape for architecture. Maths - Space A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s math films show abstract...
Curated Video
Ovule
The gamete of a flowering plant, similar to an egg cell in animals. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
Curated Video
Nucleus (biology)
In biology, the nucleus is the membrane-bound structure inside eukaryotic cells that contains most of the genetic material. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
Curated Video
Learn How To Draw Lewis Structures Easily: 4 Simple Steps For Perfect Chemistry Diagrams Every Time
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...
Great Big Story
The monument to the battle of the nations, a European giant
Explore the history and grandeur of Leipzig's monument commemorating the pivotal 1813 battle against Napoleon.
Curated Video
Lactic Acid: A Case Study in Chirality
Lactic acid (2-hydroxypropanoic acid) is a classic example of a chiral molecule. It contains a chiral center at the second carbon atom, bonded to a hydroxyl group (-OH), a hydrogen atom, a carboxyl group (-COOH), and a methyl group...
Curated Video
Symmetry and Optical Activity: Do Your Molecules Have It?
Symmetry and optical activity are intricately linked in organic molecules. A molecule is optically active if it can rotate the plane of polarized light. Optical activity arises from the molecule’s lack of symmetry—specifically, its...
Curated Video
Conditions for Optical Activity: When Molecules Twist Light
For a molecule to exhibit optical activity, it must be chiral, meaning it has no internal plane of symmetry. Additionally, the solution or compound should not contain equal amounts of enantiomers (racemic mixture), as these cancel out...
Curated Video
Chirality in Organic Compounds: Asymmetry in Action
Chirality refers to molecules that have a non-superimposable mirror image due to an asymmetric carbon atom. These chiral compounds are vital in many biological systems, as their mirror images often have different effects
Curated Video
Conformational Isomerism: Rotations that Change Everything
Conformational isomerism arises due to the rotation around single bonds (sigma bonds) within a molecule. Unlike other types of isomerism, conformational isomers, or conformers, can interconvert without breaking bonds. For example, in...
Curated Video
Rules for Writing Resonating Structures: Get Them Right!
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...
Curated Video
Conditions for Resonance: Why Acetamide and Carbonate Matter
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...
Curated Video
Resonance in Chemistry: The Dance of Electrons
Resonance is a concept used to describe delocalization of electrons in a molecule across multiple atoms. In resonance structures, electrons are shared between atoms in ways that stabilize the molecule. This "electron dance" can lower the...
Bedtime History
Rosalind Franklin for Kids | Bedtime History
Explore the remarkable life and contributions of Rosalind Franklin, a pioneering scientist whose work was crucial in the discovery of DNA's double helix structure. Born in 1920 in London, Franklin was a brilliant chemist and X-ray...
Wonderscape
How Was Stonehenge Built? Unraveling the Ancient Techniques
Delve into the mysteries of how Stonehenge was constructed over 1,500 years by Neolithic builders. Learn about the possible methods used to transport massive bluestones over 180 miles, shape the sarsen stones, and assemble the iconic...