We add a jelly baby to a boiling tube containing potassium chlorate. When the chemicals react, gas is rapidly produced. The screaming sound is created as the gas escapes from the tube. The sweet burns brightly as the reaction occurs....

We use a drinking straw, some water and universal indicator to show that breathing out creates acid. Universal indicator is added to the water to show its pH value. When we blow into the water the indicator changes colour showing that...

We use maggots to let us observe aerobic respiration. The maggots are placed over sodium hydroxide in a specimen tube. A bung and delivery tube are attached to the specimen tube that feed into a boiling tube of coloured water. In the...

We add mints to diet cola in order to produce a fountain. When we add the mints to the diet cola, the porous surface of the mint causes the carbon dioxide trapped within the drink to be released rapidly, resulting in a cola volcano....

We use magnesium and blocks of dry ice to show how a redox reaction occurs. A cavity in a block of dry ice is filled with coils of magnesium ribbon, which are set alight. A second block is then placed on top, but instead of this putting...

We inflate a rubber glove using the gas produced during a neutralisation reaction. Bicarbonate of soda is added to vinegar in a beaker covered by a rubber glove and it expands. The gas is used to extinguish a flame, showing that it is...

We release carbon dioxide from a fire extinguisher against a dark cloth to see what happens. The expanding gas cools as it leaves the extinguisher, forming a visible dry ice solid on the cloth. As it warms, the carbon dioxide vanishes...

For centuries, humans have been extracting metals from molten ores. Today, the basic technique remains the same, but how does extraction work? Chemistry - Reactions - Learning Points. Metals can be extracted from rocks if they are heated...

Ice cores taken from deep within the Earth's polar regions hold a hidden secret: the historical record of the Earth's climate. Earth Science - Human Impacts - Learning Points. Evidence of natural climate changes can be found in...

Discover the chemical process which produces some of our most common foodstuffs, from bread to yoghurt, to wine and vinegar. Chemistry - Chemical Industries - Learning Points. Fermentation is the process of converting sugar and other...

International governments have put caps in place to limit carbon dioxide emissions from industry. What are emissions caps and will they solve the problem? Human Geography - A Changing World - Learning Points. The percentage of carbon...

The biggest artery in the body. 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...

Vinegar is added to bicarbonate of soda ... what happens next?
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Material processes - Changing materials - Chem
i

cal reactions


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

Six gas molecules are shown on screen ... can you spot the molecules that make up air?
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Material processes - Solids, liquids and gases - Characte
r

istics of air />

Learning Points
Oxygen,...

Did you know that greenhouse gases in the atmosphere prevent heat from escaping?
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People and places - Future of energy - The


energy debate />

Learning Points

C

arbon dioxide is a greenhouse...

True or false ... Biofuels don't release carbon dioxide when burnt?
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People and places - Future of energy - The


energy debate />

Learning Points
Biofuels release carbon dioxide, but
a

re a...

Four waste products are shown, but which is the odd one out?
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Life processes - Living process
e

s - Excretion


A Twig Tidbit Film - Odd one out. The children have to work out which of four images is...

Find out how deforestation in the Amazon rainforest affects the whole planet, and what is being done to stop it disappearing completely.
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People and places - Human impact on the environment - H
u

mans on Earth...

Did you know you are one big walking talking chemical reaction?
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Material processes - Changing materials - Chem
i

cal reactions />

Learning Points
Chemical react
i

ons happen inside the human...

You may not think about it much, but air is everywhere and it is essential to life.
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Material processes - Solids, liquids and gases - Characte
r

istics of air />

Learning Points
Air is a...

Find out how harmful gases in the air can react together to create smog ... a form of air pollution.
<

br/>

People and places - Human impact on the environment - Pol
l

uting the air />

Learning Points...

Meet the Carbon family and discover why reducing our carbon emissions will help stop global warming.
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br/>

People and places -Future of energy - The fu
t

ure of energy />

Learning Points
...

Erupting volcanoes are a captivating example of materials changing state.
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Material processes - Solids, liquids and gases - Ch
a

nges of state />

Learning Points
Molten


rock underground is...

Explanation of the circulatory system.
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Life processes - Body systems - The circ
u

latory system />

Learning Points
The heart is a strong muscle tha
t

pumps blood throughout the body.
...