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Solar storm
Or geomagnetic storm, a severe disruption of the Earth's magnetosphere that can cripple satellites, and even cause severe damage to electrical systems on the ground. A Twig Science Glossary Film. Key scientific terms defined in just 60...
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Water table
The level below which the ground is completely saturated with water. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
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Aquifer
An underground layer of porous rock or other material that is permeated with water. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...
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S-wave
One of two types of seismic wave produced in an earthquake. 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...
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Seismic waves
Sound-like waves that travel through the ground from an earthquake or other source of vibration. 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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Potential energy
Energy that is stored by an object because of its position. 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...
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P-wave
A fast-moving seismic wave produced by an earthquake. 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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Caldera
A large cauldron-like volcanic feature, formed when a chamber full of magma empties and the ground above it collapses. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
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Eclipse, solar
When the Moon is aligned directly in between the Sun and the Earth, it obscures all or part of the sun to an observer on the ground. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Long-period events
Earthquakes with relatively low-frequency vibration, caused by sudden changes of pressure inside volcanoes and magma channels. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Dawson's Bee
For this large burrowing bee, mating season isn’t just competitive – it’s deadly. Biology - Animal Kingdom - Learning Points. Dawson's burrowing bee is one of the largest bee species in the world. Dawson's bees are solitary bees, and...
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Pressure and Surface Area
Learn how surface area can affect the amount of pressure exerted, and why this is useful in life? Physics - Forces - Learning Points. Pressure is the amount of force acting on a set area. Pressure is measured in pascals. Pressure can be...
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Factpack: Background Radiation
Although radioactive materials are associated with power stations and bombs, we live with radioactive substances all around us. What are they, and do they affect us? Physics - Energy And Radioactivity - Learning Points. A Twig FactPack...
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How We Balance: Part 2
Learn how the brain, eyes, skin and muscles help us achieve the incredible challenge of balancing. Biology - Being Human - Learning Points. Your brain maintains balance by combining information from you eyes, ears, skin and muscles. Your...
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Plant Transport
How does a tall tree draw water from its roots to its leaves? And how does food made in leaves reach the rest of a plant? Discover how plants transport resources via the xylem and phloem. Biology - Plants - Learning Points. Transpiration...
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Pollution: Air
What are the major atmospheric pollutants and where do they come from? Discover what air pollution means for the environment and how it affects humans, from smog to acid rain. Earth Science - Human Impacts - Learning Points....
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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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Ordnance Survey Maps
Ordnance Survey has been creating maps for hundreds of years. How have their mapping methods changed since the first Ordnance Survey maps were made? Human Geography - Orientation And Settlements - Learning Points. The British Ordnance...
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Pollution: Land
How does land get polluted, and what with? Discover the quantities of waste deposited in landfills each year, and just how much could be recycled. Earth Science - Human Impacts - Learning Points. Landfills are holes in the ground where...
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Terminal Velocity
If a skydiver jumps out of a plane, when will they stop accelerating? Competing physical forces hold the answer. Physics - Forces - Learning Points. Terminal velocity is the maximum constant velocity. Terminal velocity increases with...
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Secret of the Sahara
It may be dry and sandy now, but the Sahara desert used to look very different. Evidence buried deep beneath the dunes reveals that the landscape has been changing naturally over thousands of years. Earth Science - Weather - Learning...
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Percentages: Feeding the Nutcracker
See the preparations the tiny Clark's Nutcracker makes for winter. Alongside its incredible memory, this bird must play the percentage game to survive. Maths - Number A Twig Math Film. Reinforce and extend the learning required by the...
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Newton's Laws of Motion
Isaac Newton's Laws of Motion explain how and why objects move as they do - the principles which underlie all of modern mechanics. Physics - Forces - Learning Points. Sir Isaac Newton published his laws of motion in 1687. Every movement...
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What Are Asteroids?
How are asteroids in our Solar System formed, where are they found, and what danger do they pose to life on Earth? Physics - Our Solar System - Learning Points. Asteroids are made from rock, metal or carbon, while comets are made of rock...