Curated Video
Atom
The building blocks of all matter, being the smallest unit that retains the chemical properties of an element. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
Curated Video
Atomic number
The number of protons in the nucleus of an atom. 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 abstract concepts...
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Cytoplasm
The thick liquidy medium that fills all cells, and is contained by the cell membrane. The cytoplasm is where most of the cell's chemical reactions, such as glycolysis, take place. A Twig Science Glossary Film. Key scientific terms...
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Nuclear
Relating to the nucleus of an atom. The 'nuclear model' of the atom is one that describes a system of a nucleus surrounded by electrons. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images...
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Factpack: Structure of the Atom
The different ways scientists have explained the structure of the atom, and how it has changed throughout history. Chemistry - Atoms And Bonding - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt...
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What Are Comets?
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...
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How Does DNA Make Protein?
DNA carries genetic information to produce proteins and build new cells: a process at the heart of all life on Earth. Biology - Cells And DNA - Learning Points. Deoxyribonucleic Acid (DNA) carry the genetic code required to make protein...
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Atom Structure: Electron Shells
Learn why electron shells are responsible for the properties of elements, and whether they are stable or have violent reactions. Chemistry - Atoms And Bonding - Learning Points. An element's reactivity is determined by the number of...
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Flame Colours and Fireworks
Exploring the science behind fireworks, discover how different elements are used to produce different colours of fireworks. Chemistry - Atoms And Bonding - Learning Points. In the mid-19th century the inventor if the Bunsen burner,...
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Heavy Water
Why did allied soldiers in World War Two embark on a dangerous mission to stop the Nazis using heavy water? Chemistry - Atoms And Bonding - Learning Points. Atoms that have the same number of protons and electrons but different numbers...
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Nuclear Weapons
How the principles of nuclear physics have been used to unleash massive destruction. How do fission bombs and thermonuclear bombs work, and what are the differences between the two? Physics - Energy And Radioactivity - Learning Points....
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Nuclear Fission: The Power and Dangers of Splitting Atoms
Find out what happens when an atom splits and why, depending on how this process is controlled, the consequences can be productive or destructive. Physics - Energy And Radioactivity - Learning Points. Nuclear fission creates energy by...
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How to Make Fake Snow
Snow forms in the atmosphere as a result of water molecules attaching themselves to nuclei bacteria. But scientists have found ways to manipulate the freezing process of water and the production of these nuclei to create snow...
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What is a Cell? - Life’s Building Blocks
Every living thing on our planet, from plants to animals, is made up of cells. Cells are the building blocks of life, but what are they and how do they work? Biology - Cells And DNA - Learning Points. All cells have vital genetic...
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Dolly the Sheep
In 1997, Scottish scientists announced the first successful cloning of an adult animal - Dolly the Sheep. But her birth was mired in controversy. Biology - Cells And DNA - Learning Points. Dolly the sheep was the world's first clone....
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Kiwi Fruit DNA
We extract the DNA from a kiwi fruit by mashing it with detergent liquid, salt and water. The mixture is then filtered and incubated before a layer of chilled ethanol is added. The jelly-like DNA can then be extracted. Biology - Cells...
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Plant vs Animal Cells
We compare plant cells and animal cells under a microscope to see how they differ. Cheek cells are dyed with methylene blue to make the observations possible. Biology - Cells And DNA - Learning Points. Almost all cells are invisible to...
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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...
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Therapeutic Stem Cells
Stem cell therapy is a radical new treatment with the potential to restore eyesight and heal injuries. However, many object to its moral implications. Biology - Cells And DNA - Learning Points. Stem cells can repair or rebuild damaged...
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Forces of Nature
Introducing the four main forces of nature: gravity, electromagnetic force, weak and strong nuclear forces. Learn why they are fundamental to life on Earth. Physics - Forces - Learning Points. There are four fundamental forces of nature....
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What is DNA?
How does our DNA make us unique, and how is this unique genetic information passed on when cells divide? Biology - Cells And DNA - Learning Points. Deoxyribonucleic Acid (DNA) molecules are found in chromosomes within all our cells. DNA...
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Nuclear Waste
Nuclear fission is the process used in nuclear power plants, which creates radioactive nuclear waste that is hazardous to humans. Discover how this nuclear waste is disposed of and stored. Earth Science - Earth's Resources - Learning...
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Cloning
A look at natural cloning and the main artificial cloning techniques devised by man, including embryo transplant and fusion cell cloning. Biology - Cells And DNA - Learning Points. Cloning occurs naturally in asexual reproduction in...
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Radioactive Half-Life
Discover how radioactive substances change over time, and how this affects whether they are hazardous to humans. Physics - Energy And Radioactivity - Learning Points. Dangerous radioactive substances will not be dangerous forever due to...