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Atmosphere
A layer of gas surrounding a planet or star, held in place by gravity. 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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Tropism
When a plant grows in a particular direction in response to an external stimulus. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...
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Dark energy
A mysterious energy field present across the entire known Universe, which accounts for 70% of its mass-energy. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Galaxy
A collection of billions of stars, along with gas and dust, held together by its own gravity. 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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Centre of Gravity: Weight Balance Point
The point from which the whole weight of an object appears to act. 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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Dark matter
Believed to make up most of our Universe, we cannot see dark matter, and nobody knows what it is. 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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Black hole
An object in space with enough mass in a relatively small region of space that nothing can escape its gravity, not even light. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Gravity - Attractive Force of Mass
An attractive force that acts between all matter that has mass, and is proportional to mass. 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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Vector
A quantity that has both magnitude, or size, and direction. 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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Solar System
Our Sun and the collection of bodies that are bound to it by gravity. 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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Theory
An explanation or model that is logical, testable and predictive. 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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Buoyancy: The Forces That Determine Why Objects Float or Sink
Discover the forces at work underwater, which dictate why large boats float but small pebbles sink. Physics - Forces - Learning Points. The buoyant force is an upward-acting force determined by the weight of the displaced water. Ships...
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Rollercoasters
Journey through a rollercoaster ride to find out which forces are at work to create this theme-park thrill. Physics - Forces - Learning Points. Rollercoasters do not have engines. Rollercoasters use forces. Electromagnets are used along...
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Planet Hunters
Scientists suppose there could be other life-bearing planets like Earth. To find them, they are looking for 'wobbling' stars. Physics - Universe - Learning Points. When a planet orbits a star, it has just enough gravitational force to...
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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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Fly Me to the Moon
What do you need to do to get into space? An explanation of orbits, forces and the 'slingshot effect'. Physics - Our Solar System - Learning Points. In order to land on the Moon, Apollo 11 had to be launched at just the right speed. If a...
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Factpack: G-Force
Chart G-Force up the scale, from standing still to the greatest G-force ever. Physics - Forces - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use to grab attention at the start...
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Shoemaker-Levy
The collision of comet Shoemaker-Levy 9 with Jupiter in 1993 was the first collision of its kind to be witnessed by man. Physics - Universe - Learning Points. The comet Shoemaker-Levy 9 was discovered orbiting Jupiter in 1993....
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Colonising the Moon
From the Russians' attempt to colonise the Moon to eccentric plans for Mars. Physics - Universe - Learning Points. The longest anyone has ever stayed on the Moon is 75 hours. Helium-3 is rare on Earth but can be processed from Moon soil,...
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The Birth of Our Solar System
The explosive reactions and forces, from gravity to nuclear fsion, which formed our Solar System. Physics - Our Solar System - Learning Points. Our Solar System is the region of space which falls within the gravitational influence of our...
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Time Travel
Is it possible to travel through time? Do the laws of physics make it impossible? How could it be achieved? Physics - Waves - Learning Points. Although the science is theoretical, the laws of physics do not rule out time travel. Einstein...
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How Do Animals Fly?
Biological evolution has allowed some animals to fly. Find out exactly how their wings work to achieve this. Physics - Forces - Learning Points. Flight occurs when the upward force is greater than the downward. Flight is explained by...
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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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Black Holes
Discover how dying stars transform into black holes, areas of mass so great that even light can't escape. Physics - Universe - Learning Points. When a star dies, it collapses and condenses into a single point, known as a singularity. The...