Kites fly because of the aerodynamic forces of lift and drag. The difference in air pressure on the top and bottom of the kite creates lift. The drag is created by the friction of the air flowing around the kite. The lift balances the...

Hawking radiation was first discovered by English scientist Stephen Hawking in 1974. Prior to this discovery, our knowledge of black holes was very limited. It was believed that black holes were completely black and that they did not...

Korea was split into North and South Korea after WWII when Japan surrendered its colonies to the US and Soviets. The US occupied the South, and the Soviets took the North, split along the 38th parallel. This division eventually led to...

The crushed stones that line railroad tracks are collectively called track ballast. More specifically, the track ballast constitutes the trackbed upon which sleepers or railroad ties are laid. As you may have seen, these stones are...

Not moving, completely at rest.
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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...

The use of energy to move particles across a cell membrane from a lower concentration to a higher concentration.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning...

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...

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...

Hot air balloons rely on heat alone to keep them in the sky. How does this work? Physics - Energy And Radioactivity - Learning Points. Hot air rises in cool air because it is less dense. The hot air within a hot air balloon creates the...

The air we breathe is made up of a mixture of gases. Discover the invisible forces of gas at work around us. Physics - Forces - Learning Points. The air we breathe is made up of gases including nitrogen, oxygen and carbon dioxide. The...

The cutting edge bike and clothing designs that make cyclists more aerodynamic and can make the difference between winning and losing. Physics - Forces - Learning Points. A professional cyclist's main aim is to reduce air resistance. New...

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...

Changes in acceleration pose an extreme risk for fighter pilots. Find out how they train to avoid blacking-out during flights. Physics - Forces - Learning Points. Fighter pilots undergo training to allow them to cope with G-force....

Forces play a huge role in the sport of curling. Discover how curlers manipulate friction as they compete. Physics - Forces - Learning Points. Friction plays an important part in sports, including curling. Curlers use the power of...

What is the difference between solids, liquids and gases? How does each state behave? Chemistry - Atoms And Bonding - Learning Points. The kinetic theory of matter states that particles are in constant motion and there are forces of...

Where are fold mountain ranges found on our planet? And how do the movements of tectonic plates affect their growth? Earth Science - Geology - Learning Points. A Fold mountain forms over millions of years by a process called orogeny....

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...

Plastics are all made in a similar way, but can be manipulated to have very different functions. Discover how their properties are determined. Chemistry - Chemical Industries - Learning Points. Plastics are synthetic materials called...

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...

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....

A strong material is one that is resistant to wear and physical force. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...

Did you know that forces make everything move?
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The world around us - Investigating forces - What make
s

things move? />

Learning Points
Forces can make things move
,

speed up and/or change...

True or false ... Unbalanced forces cause an object to change speed?
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Physical processes -Force and motion - Actio
n

and reaction />

Learning Points
Unbalanced forc
e

s cause an object to change...

Six different clips are shown, five of them showing examples of balanced forces ... can you spot which ones?
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Physical processes - Force and motion - Actio
n

and reaction


A Twig Tidbit Film - Spot...