Why does chemistry happen?? Why do ions form?? Why do elements bond together?? These are all important questions and the answer comes back to one very important principle in chemistry and that is element stability. Elements are stable...

This episode of Weathered explores the controversial world of solar geoengineering by injecting sulfate aerosols into the stratosphere, looking at both the controversial promises and profound risks associated with manipulating the...

A nuclear reaction in which two atomic nuclei fuse to form a larger one.
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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...

A type of particle produced in some types of radioactive decay, being one of the most widespread forms of ionising radiation.
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br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using...

The formation of atomic nuclei from neutrons, protons and smaller nuclei.
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br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

Elements in group 8, also called group 0, of the periodic table.
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br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...

Where does Jupiter fit into the Solar System and what makes this planet unique?



Physics - Our Solar System - Learni

ng Points.

Jupiter is the 5th

planet from the Sun.

Sev

enty-nine moons orbit...

Where does Uranus fit into the Solar System and what makes this planet unique?



Physics - Our Solar System - Learni

ng Points.

Uranus is the 7th
planet from the Sun.
Each of Uranus's 27 moons is named...

The emission of particles as a result of the spontaneous decay of atomic nuclei.
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br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

Find out why helium balloons float. Chemistry - Periodic Table - Learning Points. Helium is the second most abundant element in the entire Universe, but is very rare on Earth. Helium is incredibly light, so its atoms simply float off...

Discover one theory about a single event over 13.8 billion years ago, that might have created our Universe.



Physics - Universe - Learni

ng Points.

The Big Bang took place over 13.



8 billion years...

Where does Saturn fit into the Solar System and what makes this planet unique?



Physics - Our Solar System - Learni

ng Points.

Saturn is the 6th

planet from the Sun.

Saturn has such a low density...

Our Sun is a medium sized star, which creates the perfect conditions for life on Earth. What happens on the Sun and how do stars, including the Sun, live and die?



Physics - Our Solar System - Learni

ng...

Where does Neptune fit into the Solar System and what makes this planet unique?



Physics - Our Solar System - Learni

ng Points.

Neptune is the 8th
planet from the Sun.
It takes Neptune 165 Eart
h years to...

Carbon occurs naturally in four different forms. Discover how they differ and why? Chemistry - Atoms And Bonding - Learning Points. Carbon is present in all living organisms. Carbon in its elemental form appears as four distinct...

How a race between two scientists to liquefy gases led them near to absolute zero - the coldest temperature possible. Physics - Energy And Radioactivity - Learning Points. Absolute zero occurs at -273.15 degrees Celsius. Absolute zero is...

Lasers are usually associated with heat. But scientists have instead used them to reach the coldest temperature ever recorded. Could they reach absolute zero? Physics - Energy And Radioactivity - Learning Points. Absolute zero is...

What are stars made of? How are they born, how do they live, and how do they die? Physics - Our Solar System - Learning Points. Our nearest star is the Sun. A star is formed from a cloud of dust and gas, which shrinks under gravity and...

The noble gases were one of the last groups of elements to be discovered. From helium balloons to light bulbs, these gases have many uses in the world around us. Chemistry - Periodic Table - Learning Points. The noble gases are found in...

The discovery by Robert Bunsen which allowed elements to be identified more easily, and even led to the discovery of new ones. Chemistry - Atoms And Bonding - Learning Points. Gustav Kirchoff assembled the first spectroscope - two...

Sound waves move through different mediums at different speeds, but why is this? What factors affect the speed of sound? Physics - Waves - Learning Points. Speed of sound depends on many different factors. Temperature, elasticity and...

Discover how elements are formed in the centre of stars, and how some elements are formed in even more spectacular conditions. Chemistry - Periodic Table - Learning Points. Most elements were created in space. At the beginning of the...

We look at how an incandescent light bulb can be made. First we attach a tungsten wire to electrodes in a flask of air and pass a current through the wire. The wire glows briefly before burning and breaking. Next we fill the flask with...

We lower a helium-filled balloon into liquid nitrogen to see how the change in temperature affects its volume. When it hits the cool liquid nitrogen, the gas inside contracts and the volume of the balloon decreases. When it is removed...