Discover how the destruction of the rainforest impacts ecosystems, and begins a cycle that contributes to global warming. Earth Science - Human Impacts - Learning Points. Forests are home to 70% of Earth's land animals and plants....

The Taiga forest is the largest land ecosystem on Earth, stretching from Alaska to Japan. Explore the Taiga and discover the plant and animal life that survives these freezing conditions. Biology - Ecosystems - Learning Points. The Taiga...

Phytoplankon - microscopic marine plants - could help prevent global warming. How would they do this? And is it right for man to interfere with nature in a bid to save the planet? Human Geography - A Changing World - Learning Points....

The heart powers everything you do. It pumps without you thinking about it, and beats over a billion times in an average lifetime. But how does it work? Biology - Human Body - Learning Points. The heart is the hardest working muscle in...

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...

Journey into the chloroplast, where photosynthesis takes place, to learn how plants convert sunlight into usable chemical energy - one of the most vital processes on Earth. Biology - Plants - Learning Points. Leaves are small...

The 17th century German chemist Johann Becher proposed that an element, phlogiston, was released when substances burned. He was wrong, and his incorrect theory led many early chemists to misunderstand the significance of some of their...

Proteins are at the root of virtually all bodily functions, from growth to metabolism to transporting oxygen around the body. Learn how your body makes or ingests all the protein you need. Chemistry - Chemical Industries - Learning...

Metals are used in the human body for a wide range of medical purposes. Discover which metals are used and what properties they have that can help to heal us. Chemistry - Periodic Table - Learning Points. Titanium, stainless steel and...

Discover which foods are vital for a healthy diet. What should you be eating, how much, and why? Biology - Healthy Living - Learning Points. You need a balanced diet to be healthy. A balanced diet is varied and contains different amounts...

Everything we eat contains calories. We need them to function and carry out everyday tasks. How do we know which foods are right to eat and which contain 'empty calories'? Chemistry - Chemical Industries - Learning Points. Calories are...

Discover the amazingly diverse world of algae. These species come in all shapes and sizes, and are one of the most important groups of organisms on our planet. Biology - Ecosystems - Learning Points. Algae produce more oxygen than all...

The unique force created by hydrogen bonding gives water some unique properties, which seem to defy the laws of nature. Chemistry - Atoms And Bonding - Learning Points. Hydrogen bonding is a special force of attraction between water...

Rain is essential to our planet. Without it, all life on Earth would struggle to survive. How do rain clouds form and what determines whether it rains or not? Earth Science - Weather - Learning Points. Rainfall comes from the clouds...

Esters occur in nature and have been harnessed by the perfume industry. What are esters and how are they made and used? Chemistry - Chemical Industries - Learning Points. Esters give many fruits their scents, including bananas, lavender...

Every living thing on our planet, from plants to animals, is made up of cells. Cells are the building blocks of life, but what are they and how do they work? Biology - Cells And DNA - Learning Points. All cells have vital genetic...

Potassium nitrate is a natural substance found in your food, or in an exploding firework. What makes it so versatile? Chemistry - Chemical Industries - Learning Points. Potassium nitrate preserves our food and is a component of...

Two or more atoms held strongly together by covalent bonds. 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...

We investigate the conditions needed for rust to form. Four iron nails are placed under different conditions. One is half submerged in water. Another is completely submerged in boiled water. One is half submerged in salt water. The final...

We use electrolysis to break water molecules down into hydrogen and oxygen. This is done using the Hoffman apparatus. Water is added to the apparatus along with some dilute sulfuric acid. When a current is passed through the water,...

Water is added to dry and bent matchsticks to let us see capillary action at work. The wood absorbs the water causing the matchsticks to straighten. Biology - Plants - Learning Points. Water is a polar molecule because the electrons are...

We use yeast to let us observe anaerobic respiration. The yeast is added to warm water and glucose. A layer of oil is placed over the solution so that no oxygen is available. The solution starts to bubble and the gas produced passes...

We dissect and examine a cow\u2019s lungs. Before the dissection, the lungs are inflated to show the changes in volume that occur when mammals breathe. During the dissection the position and function of different parts are examined,...

We use potassium ferricyanide and luminol indicator to show how forensic scientists detect blood at crime scenes. The luminol indicator contains luminol, sodium hydroxide and hydrogen peroxide. When luminol comes into contact with the...