Curated Video
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...
Curated Video
Momentum
Explore the reasons why objects can keep moving on their own, and why most of them will eventually stop. Physics - Forces - Learning Points. Momentum is how we quantify a moving object. Outside forces affect momentum. Momentum is...
Curated Video
Centre of Gravity: Finding the Balance Point of Irregular Objects
We use a plumb line and hook to find the centre of gravity of an irregularly shaped piece of card. A hole is punched in the card and it is suspended from the hook. A plumb line is used to let us draw the vertical line under the hole on...
Curated Video
Balloon and Treacle
We investigate the effect that unbalanced charge has on polar molecules. We rub a balloon against hair to build up a negative charge and then hold this near a stream of water and then a stream of treacle. They both bend towards the...
Curated Video
Hero's Engine
We use a Hero's engine model to show how equal and opposite forces can cause propulsion. Two holes are pierced in a metal bottle and some water is added. This is suspended above a Bunsen burner, and as the water boils and leaves the...
Curated Video
Smashing Eggs
We use eggs to show how different rates of deceleration affect the outcome of collisions. One egg is dropped onto a hard surface and breaks. The second egg is dropped onto a soft surface and bounces, as the material slows its...
Curated Video
Logic: Bayesian Robots
Meet the robots who use statistics to learn about the world around them. Maths - Statistics And Probability A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in...
Curated Video
Speed, Velocity, Acceleration
Discover how speed, velocity and acceleration are interlinked but very different measurements of motion. Physics - Forces - Learning Points. The velocity and acceleration of any moving object can be calculated. Speed is the distance...
Curated Video
Calculus: Newton
Newton's development of calculus, and how this changed the way we describe the world. Maths - History Of Maths A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in...
Curated Video
What is an Orbit?
How the orbit of the planets is dictated by mass and the force of gravity. Physics - Our Solar System - Learning Points. The curved path of one object around another is its orbit. Objects orbit due to the effects of gravity. The...
Curated Video
Medical Marvels: Ultrasound
Born out of research into RADAR in World War Two, ultrasound has become one of the most important medical inventions. What is it, and how does it work? Biology - Being Human - Learning Points. Ultrasound was developed by Ian Donald in...
Curated Video
Planes, Wedges, Screws
There are only six basic types of machine. Discover more about planes, wedges and screws: what are they and why are they useful? Physics - Forces - Learning Points. Machines based on the ideas of Archimedes make work easier. An inclined...
Curated Video
Weight
The force of gravity acting on a mass, measured in newtons. On Earth, gravity exerts a force of just under 10 newtons per kilogram. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
Curated Video
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...
Curated Video
Observer
In physics, an observer is a person or system that records some observable property of a system, such as the velocity of an object. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
Curated Video
Buoyancy: Upward Force from Surrounding Fluid
The upward force exerted on an object by the fluid which surrounds it. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
Curated Video
How does sound travel?
Sounds travel in waves. The world around us - Light and sound - Sound Learning Points Sounds are made by tiny movements called vibrations. Sound energy travels in waves. These vibrations travel out from the sound source in all...
Curated Video
Action and reaction – True or false
True or false ... Unbalanced forces cause an object to change speed? Physical processes -Force and motion - Action and reaction Learning Points Unbalanced forces cause an object to change speed. A Twig Tidbit Film - True or False? The...
Curated Video
Reducing Friction: Speed is the Rate of Motion
Did you know that speed is the rate of motion? Physical processes - Force and motion - Reducing friction Learning Points Force causes an object to move. The size of the force acting upon an object affects its speed. A Twig Tidbit Film -...
Curated Video
Calculating Density
See how the density of an object is calculated and why some materials are buoyant. Material processes - Classifying materials - Properties of materials Learning Points Density is the mass inside a certain volume. Objects that float are...
Curated Video
Cat and mouse shadows
Learn that shadows change size as the angle of a light source changes. Physical processes -Light - Shadows Learning Points The length of a shadow can change with the angle of the light source. The length of a shadow depends on the amount...
Curated Video
What is a force? – Odd one out
Four examples of actions that change the shape of objects are shown, but which is the odd one out? Physical processes - Force and motion - What is force? A Twig Tidbit Film - Odd one out. The children have to work out which of four...
Curated Video
What is a force? – Did you know?
Did you know that force is measured in newtons? Physical processes - Force and motion - What is force? Learning Points Forces are measured in newtons. A Twig Tidbit Film - Did you know? A fascinating fact is revealed.
Curated Video
Opposing forces
Opposing forces are at work all the time, even when you aren't moving! Physical processes -Force and motion - Action and reaction Learning Points When opposing forces are balanced, an object remains stationary. Unbalanced forces cause an...