Revealing the elements which make up the human body, and their relative abundance.
<

br/>

Chemistry - Periodic Table - L
ea
rning Points.
/> A Twig FactPack Film.
Open a discussion on what has been already...

A highly reactive group of metals that make up group one in the periodic table.
<

br/>

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

An inorganic chemical element necessary for human growth and health, such as iron, sodium, potassium, or magnesium.
<

br/>

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

Salt was discovered thousands of years ago as a way of preserving food. How does it do this? And what else does salt preserve? Chemistry - Chemical Industries - Learning Points. Food rots because of bacteria and fungi. Salt is an...

Find out why sodium is highly reactive and highly useful! Chemistry - Periodic Table - Learning Points. Sodium is a highly reactive metal. Sodium is so reactive, it cannot exist naturally in its pure state. Sodium is found in salt, soap...

How chemicals in these drinks help boost your energy.
<

br/>

Chemistry - Chemical IndustriesL
ea
rning Points.
/> A Twig FactPack Film.
Open a discussion on what has been already learnt in a topic, or use to...

Alkalis and acids can be neutralised to great and varied effect. For example, it is neutralisation reactions that help us breathe underwater or cure indigestion. Chemistry - Reactions - Learning Points. A neutral solution is pH 7 Sodium...

The properties of water and its uses, depend on its mineral content. What minerals are found in water and how do they affect it? Chemistry - Periodic Table - Learning Points. Water contains dissolved mineral ions, such as sodium, calcium...

The story of chemist John Newlands and his theory of the "Law of Octaves" that related chemical elements to notes in the musical scale. Did the scientific community accept his unusual theory and does it hold up to the laws of modern...

Some reactions take in energy and some release energy. Why? And what are some common examples of each type of reaction? Chemistry - Reactions - Learning Points. An energy change occurs when reactions take place. Exothermic reactions...

The properties of strong acids and alkalis can be extremely harmful. Where do we find them, and how can we tell how acidic or alkaline a substance is? Chemistry - Reactions - Learning Points. Bases neutralise acids, and if a base...

Exploring the science behind fireworks, discover how different elements are used to produce different colours of fireworks. Chemistry - Atoms And Bonding - Learning Points. In the mid-19th century the inventor if the Bunsen burner,...

Witness the exciting reactions that occur when alkali metals come into contact with other substances. What does this tell us about their properties? Chemistry - Periodic Table - Learning Points. The alkali metals make up Group 1 of the...

We compare the reactivity of Group 1 and Group 2 metals. We add sodium and then potassium to water. We observe the reactions. Next we add magnesium and then calcium to hydrochloric acid and observe the reactions. The results let us put...

We use filtration and evaporation to separate out a mixture of water, sand and salt. The sand is removed using filtration, as it did not dissolve in the water. The remaining solution is heated until the water evaporates, leaving behind...

We use a Bunsen burner to burn different chemical salts to see how the flame colour changes. This shows that sodium burns with a yellow flame, lithium burns with a red flame, barium burns with a yellow-green flame and copper burns with a...

How metals and non-metals combine to form compounds with unique and very different properties. Chemistry - Atoms And Bonding - Learning Points. An electrically charged atom is called an ion. Ionic bonds are very strong. Ions are formed...

What does the Periodic Table tell us about the elements, their properties and behaviours? And why does the atomic number define each element? Chemistry - Periodic Table - Learning Points. The structure of the atom reveals why the...

Are all artificial chemicals bad for our health? Revealing the health implications of natural and artificial chemicals, and the natural chemicals which can be deadly. Chemistry - Chemical Industries - Learning Points. All matter consists...

Salt is routinely used to melt snow and ice on winter roads. But what is happening at the molecular level to cause this helpful change of state? Chemistry - Atoms And Bonding - Learning Points. When salt is added to water it lowers the...

Refers to the hydroxide ion, which is a negative ion consisting of an oxygen atom covalently bonded to a hydrogen atom. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...

Sodium is heated and added to a flask containing chlorine ... what happens next?
<

br/>

Material processes - Changing materials - More chem
i

cal reactions


A Twig Tidbit Film - What happens next? A short...

How fun is this chemical traffic light experiment!? Liquid changes colour from green to red and later to yellow. The best part is it is repeatable. Just shake the bottle to start again.



For this experiment you w
ould...

Dr. Forrester explains the uses for the mineral salt.