A measure of the speed of light in a medium, defined as the ratio of the speed of light in a vacuum, to its speed in the medium under consideration.
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A Twig Science
Glossary Film.
Key scientific terms defined in...

Bacteria from a sneeze was inadvertently sent to the Moon. When it returned to Earth, it came back to life. What does this mean for the possibility of life in the Universe?



Physics - Universe - Learni

ng...

We can see our surroundings because of light energy. Whether light waves are being emitting from a source or being reflected, this form of energy is vital to life on Earth. Physics - Waves - Learning Points. Light is an energy that...

The range of electromagnetic radiation in the electromagnetic spectrum is huge. Where does this radiation come from and how do the frequencies and wavelengths vary? Physics - Waves - Learning Points. Electromagnetic radiation is all...

Sounds can vary greatly: extremely quiet or deafeningly loud, high and shrill to low and booming. Why are they so different? Physics - Waves - Learning Points. Sound is a vibration passed to and fro along particles forming a wave. It can...

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....

Space which contains no matter at all. 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...

Find out how the lack of air resistance within the vacuum of space is an important factor in space exploration.
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Physical processes - Force and motion - Actio
n

and reaction />

Learning Points
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A ringing alarm clock is placed within a vacuum chamber ... what happens next?
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Physical processes - Sound - How does


sound travel?


A Twig Tidbit Film - What happens next? A short section of film is...

What's that noise? ... It's a vacuum cleaner!
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Physical processes -Electricity and magnetism


- Electricity


A Twig Tidbit Film - What’s that noise? The children have
to identify an object from...

Did you know that the Sun produces vibrations?
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Physical processes - Light - The Sun as
a

light source />

Learning Points



The Sun produces vibrations.


A Twig Tidbit Film - Did...

How do these flasks work to keep drinks at a constant temperature?
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Material processes - Changing material
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- Insulation />

Learning Points
Thermal insulators do not allow heat e
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ergy to...

Find out why there is no sound in space.
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Physical processes -Sound - How does


sound travel? />

Learning Points
The vibrations o
f

vocal cords produce sound waves.


On...

By the end of this learning object, the student will be able to: Summarize the types of wave motion and its law.28774

Explore the fascinating journey of vacuum cleaners from horse-drawn contraptions to high-tech household essentials. Discover how technological advancements have made vacuum cleaners 40 times more effective than brooms, transforming...

Controlling environmental factors enables you to create a safe computing space. This video looks at options for disposing of waste such as old printer cartridges and controlling temperature and humidity. The author describes proper...

Follow the instructions to create a vacuum using a tray, candle, and glass cup. Then, test the strength of your vacuum by adding objects to the tray and see if it can hold up the extra weight. This activity is a great way to teach about...

The video showcases the Mitsubishi Heavy Industries Internet-linked robot Wakamaru, designed to act as a robotic butler within the home. With the ability to recognize and interact with up to 10 individuals, Wakamaru offers personalized...

The White Sands Test Facility, located in the San Andreas Mountains of New Mexico, is a crucial testing ground for NASA's rocket propulsion systems. Since 1964, engineers and scientists have conducted over 2.1 million firings of more...

This video is answering the question of how are sound and water waves different.

We derive the equation for the capacitance of a parallel plate capacitor. Learn how adding a dielectric material to a capacitor affects its capacitance and discover the definition of the dielectric constant.

This video is explaining how robot vacuum works for kids.

We find Miss Palomine cutting coupons out of the paper. She reviews the use of scissors and this begins a discussion of tools we use around our homes.

The Black Lives Matter protests in the US, which escalated in response to the killing of George Floyd in Minneapolis, have brought the little-known but decades-old campaign to abolish US police into the spotlight. But what are...