We compare the density of oil, salt water and fresh water using displacement tanks. Equally weighted measuring cylinders are placed into the three liquids and the amount of water displaced is collected for comparison. Physics - Forces -...

We use coloured agar cubes to see how different shapes change the rate of diffusion. The cubes are made using sodium hydroxide and phenolphthalein indicator to give them a pink colour. When these are added to hydrochloric acid, the...

We look at how a vacuum affects how sound travels. An alarm is set off and placed under a bell jar. The air is removed from the jar to create a vacuum. We can still see the hammer of the alarm clock moving, but cannot hear the sound....

Meanders and oxbow lakes are found in the middle course of a river. Discover how a meander forms and how this process can lead to an oxbow lake. Earth Science - Geology - Learning Points. At its middle course, a river gathers water...

Tsunamis are huge volumes of moving water that become monstrous waves when they hit the coast. What causes them and how do they grow to be so dangerous? Earth Science - Geology - Learning Points. Tsunamis are massive volumes of moving...

How the ancient art of paper-folding solved some of the geometric puzzles that had plagued mathematic minds for millennia. Maths - Measurement A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s context...

Knowing the rate of a chemical reaction can be very important, particularly for industry. Discover which factors indicate the rate of a chemical reaction, and how you can change it. Chemistry - Reactions - Learning Points. Some reactions...

How many stars are there in the Universe? Astronomers calculate it the same way they would grains of sand on a beach... using volume. Maths - Measurement A Twig Math Film. Reinforce and extend the learning required by the curriculum....

Mass per unit of volume. 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 concepts and key curriculum...

What is it? ... It's a church bell! Physical processes - Sound - Volume A Twig Tidbit Film - Pixelate. A pixelated image unscrambles. The children have to guess what it is.

What's that noise? ... It's a peacock. Physical processes -Sound - Volume A Twig Tidbit Film - What’s that noise? The children have to identify an object from its sound alone.

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...

Dive into alligator-infested water to understand how vibrations enable these reptiles to communicate. Physical processes -Sound - What is sound? Learning Points Sound is caused by the vibration of molecules. Vibrations travel in all...

Six different clips are shown, three of these are examples of low-energy sounds ...can you spot them? Physical processes - Sound - Volume A Twig Tidbit Film - Spot the Difference. The children have to identify which objects belong in the...

Did you know that the Saturn V rocket launch produced one of the loudest sounds ever recorded? Physical processes - Sound - What is sound? Learning Points The Saturn V Rocket launch produced one of the loudest sounds ever recorded. A...

Discover how exposure to high-volume sounds can damage hearing. Physical processes - Sound - Dangers of sound Learning Points High volume sounds can damage ears and cause hearing loss. Sound levels are measured in decibels. Ear damage...

What properties do solids, liquids and gases have? Material processes - Solids, liquids and gases - Solids Learning Points Solids have a fixed shape that can only be changed by external force. Solids have a fixed volume. The molecules in...

Why do water drops form on cold windows and why does water freeze? Material processes - Solids, liquids and gases - Changes of state Learning Points Condensation is the change of state from gas to liquid. Freezing is the change of state...

Find out what it's like living next to an airport and how the problem of noise pollution can be tackled. Physical processes -Sound - Dangers of sound Learning Points Noise pollution can damage hearing. Soft materials absorb sound and...

Not all liquids act the same ... some can behave very strangely indeed! Material processes - Solids, liquids and gases - Liquids Learning Points Liquids do not have a fixed shape. Non-Newtonian liquids change behaviour when a force is...

What are the properties of a liquid? Material processes - Solids, liquids and gases - Liquids Learning Points Liquids do not have a fixed shape. The speed at which a liquid flows is known as viscosity. Liquids have fixed volume. The...

Meet the howler monkey – the loudest animal on land. Physical processes - Sound - Volume Learning Points Volume is a measure of the loudness of a sound. High-energy sounds are loud. Low-energy sounds are quiet. The larger the vibrations,...

What are the properties of a gas? Material processes - Solids, liquids and gases - Gases Learning Points Gases do not have a fixed shape and so move to fill their container. The molecules in gases are widely spaced and move about...

Find out how hot air balloons work. Material processes - Solids, liquids and gases - Gases Learning Points Air is made up of different gases. The molecules in gas are widely spaced. When heated the molecules of a gas move around and...