Curated Video
Oxygen and Combustion
Combustion reactions are vital: from keeping us warm and cooking our food, to providing electricity and propelling rockets into outer space. What do we know about these chemical reactions? Chemistry - Reactions - Learning Points....
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The Nitrogen Cycle
Nitrogen is integral to the production of protein and DNA. Discover how it is present on Earth in a constant cycle, and how nitrogen from the air enters the food chain. Biology - Ecosystems - Learning Points. The nitrogen cycle describes...
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Thunder and Lightning
Thunderstorms can be an impressive sight, but how are they formed? What is happening deep inside certain clouds to create such huge bolts of energy? Earth Science - Weather - Learning Points. Thunderstorms form in dense tall clouds...
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Global Dimming
Even though the planet is warming, the amount of sunlight reaching the Earth's surface is decreasing. What is causing this, and what effect does it have? Earth Science - Human Impacts - Learning Points. Global dimming is the reduction in...
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Friction
Friction can be friend or foe. What is friction, how does it affect our lives and how can we alter it? Physics - Forces - Learning Points. Friction is a resistive force between surfaces moving at different velocities. Friction is...
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Speed of Sound
Sound waves move through different mediums at different speeds, but why is this? What factors affect the speed of sound? Physics - Waves - Learning Points. Speed of sound depends on many different factors. Temperature, elasticity and...
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Cloud in a Bottle
We create a cloud in a bottle using warm water and smoke. Some warm water is placed in a plastic bottle and then some smoke is drawn in using a glowing splint. The bottle is sealed and then squeezed and released. The change in pressure...
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Burning Bubbles
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...
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The Bends
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...
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Types of Weather: Wind
What is wind and what are localised winds? Find out about the global cycles which take winds right across the world. Earth Science - Weather - Learning Points. Wind begins with the difference in air pressure. Air moves from areas of high...
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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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Lightning - Atmospheric Discharge
A high-current electrical discharge in the atmosphere that may occur during thunderstorms, or sometimes dust storms or volcanic eruptions. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...
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Propulsion
The process of pushing or moving an object forwards. 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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Weather
The state of the atmosphere at a specific time and place, including factors such as temperature and pressure, wind speed, and precipitation. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...
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Polluting the air – Jigsaw
What is it? ... It's a car exhaust! People and places - Human impact on the environment - Polluting the air A Twig Tidbit Film - Jigsaw. An image is slowly revealed as pieces of the jigsaw are removed. The children have to identify it.
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Characteristics of air – Jigsaw
What is it? … It's a hang glider! Material processes - Solids, liquids and gases - Characteristics of air A Twig Tidbit Film - Jigsaw. An image is slowly revealed as pieces of the jigsaw are removed. The children have to identify it.
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What do plants eat?
Find out how plants make their own food using sunlight, water and air. This is called photosynthesis. Living things - Amazing plants - What do plants need? Learning Points What do plants need to grow? Sunlight, water, air and soil....
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What do plants need?
What do plants need to grow? They need sunlight, water, air and soil. Living things - Amazing plants - What do plants need? Learning Points What do plants need to grow? Sunlight, water, air and soil. A Twig Junior Film - Core science...
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Characteristics of water – Did you know?
Did you know that each water molecule consists of two hydrogen atoms and one oxygen atom? Material processes - Solids, liquids and gases - Characteristics of water Learning Points The chemical symbol for water is H2O. A Twig...
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Characteristics of air – What happens next?
A balloon is pumped full of gas ... what happens next? Material processes - Solids, liquids and gases - Characteristics of air Learning Points A balloon expands when pumped with air. As a balloon fills with air the pressure inside...
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Expansion and conduction – Did you know?
Did you know that the hot air above the Earth expands and bends light, causing a heat haze? Material processes - Changing materials - Expansion and conduction A Twig Tidbit Film - Did you know? A fascinating fact is revealed.
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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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What is soil?
Discover the millions of microorganisms in soil. Material processes - Classifying materials - Soil Learning Points Soil is a mixture of rock particles, organic matter, air and water. Soil is formed over many years when rock is weathered...
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You are one big chemical reaction
Did you know you are one big walking talking chemical reaction? Material processes - Changing materials - Chemical reactions Learning Points Chemical reactions happen inside the human body. Respiration is a chemical reaction that...