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Chemical reaction
Any process in which one or more chemicals are changed into different products, by the breaking and formation of chemical bonds. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Functional group
An atom or group of atoms within a compound that reacts in a characteristic way, giving molecules particular chemical properties. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Photochemical reactions
A chemical reaction caused by the absorption of light. 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...
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Reducing agent
A substance that removes oxygen from, or donates electrons to, another substance during a reaction. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
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Phlogiston and Oxygen
How French Chemist Antoine Lavoisier revealed the true significance of oxygen and brought about the birth of modern chemistry. Chemistry - Periodic Table - Learning Points. Antoine Lavoisier experimented with weighing substances before...
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The Very First Cell
The Earth is billions of years old and was once a very hostile place. Eventually, a single cell was formed that evolved and reproduced. What conditions produced this first life on Earth? Biology - Cells And DNA - Learning Points....
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Percentage yield
A measurement of the efficiency of a chemical reaction, calculated by dividing the actual amount of product by the theoretical maximum amount. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...
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Why is Fat So Hard to Shift?
Discover why fat is important to our bodies, how and why it is stored - and why getting rid of excess body fat is so much more difficult than gaining it in the first place. Biology - Healthy Living - Fat is stored by the body when you...
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Photosynthesis: How Plants Convert Sunlight into Energy
Journey into the chloroplast, where photosynthesis takes place, to learn how plants convert sunlight into usable chemical energy - one of the most vital processes on Earth. Biology - Plants - Learning Points. Leaves are small...
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Solutions
Why and how do substances dissolve? Discover what happens when you create a solution. Chemistry - Atoms And Bonding - Learning Points. A solution is the mixture formed when a solid dissolves in a liquid. A solvent is a liquid that can...
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Mass of Wire Wool
We look at how the mass of wire wool changes when it is burned. Wire wool is almost 99% iron. When we burn it, it combines chemically with oxygen from the air to form iron(III) oxide. The mass of the product is more than the mass of the...
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Collision Theory
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...
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The Dark Side of Oxygen
We depend on oxygen for life. But in fact, oxygen is corrosive: ageing us, damaging cell DNA, and 'rusting' us from the inside. Biology - Human Body - Learning Points. Oxygen is vital in powering every cell and process in the human body....
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Catalyst
A substance that increases the rate of a chemical reaction without itself being permanently changed or used up. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Combustion
Or burning, a chemical reaction that requires an initial source of heat, a fuel, and an oxidising agent such as oxygen, and releases energy as heat, and often light. A Twig Science Glossary Film. Key scientific terms defined in just 60...
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Chemical reactions – Big reveal
What is it? ... These are rusty nails! Material processes - Changing materials - Chemical reactions A Twig Tidbit Film - Big Reveal. The image zooms out from an extreme close-up to full frame. The children have to guess what the image is.
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More chemical reactions – Pixelate
What is it? ... It's an explosion! Material processes - Changing materials - More chemical reactions A Twig Tidbit Film - Pixelate. A pixelated image unscrambles. The children have to guess what it is.
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Chemical Reactions: Bioluminescence
Did you know that bioluminescence is produced by a chemical reaction? Material processes - Changing materials - Chemical reactions A Twig Tidbit Film - Did you know? A fascinating fact is revealed.
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Chemical Reactions: Rust and the Process of Oxidation
Did you know that rust is a product of a chemical reaction called oxidation? Material processes - Changing materials - Chemical reactions Learning Points Rusting is also called oxidation. A Twig Tidbit Film - Did you know? A fascinating...
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Changing properties
What chemical and physical changes are at play in cake baking. Material processes - Changing materials - More chemical reactions Learning Points Chemical changes are usually irreversible. Physical changes are usually reversible. Chemical...
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What is a mixture?
Find out what makes a mixture, and what happens when materials react chemically. Material processes - Separating mixtures - What is a mixture? Learning Points A mixture is formed when different materials are combined without chemical...
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Why is the Statue of Liberty green?
Did you know that the Statue of Liberty hasn't always been green? Material processes - Changing materials - Chemical reactions Learning Points Chemical reactions produce new substances. Chemical changes always involve two or more...
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What is burning?
What are the three factors needed to make something burn? Material processes - Changing materials - Burning Learning Points Burning is a chemical reaction. Burning requires oxygen, a fuel source and heat. An exothermic reaction releases...
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Chemical Equations and Reactions: The Chemical Reactions
By the end of this learning object, the student will be able to: Summarize the important points of chemical equations and reactions.28728