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Carbohydrate
Molecules such as sugar and starch, which form an important energy source for living organisms. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
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Hydroxide
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...
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Combustion
Or burning, a chemical reaction that requires an initial source of heat, a fuel, and an oxidising agent such as oxygen, and releases energy as heat, and often light. A Twig Science Glossary Film. Key scientific terms defined in just 60...
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Characteristics of water – Did you know?
Did you know that each water molecule consists of two hydrogen atoms and one oxygen atom? Material processes - Solids, liquids and gases - Characteristics of water Learning Points The chemical symbol for water is H2O. A Twig...
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Burning – Did you know?
Did you know that wax is the fuel that keeps a candle burning? Material processes - Changing materials - Burning A Twig Tidbit Film - Did you know? A fascinating fact is revealed.
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Chemical Reactions: Rust and the Process of Oxidation
Did you know that rust is a product of a chemical reaction called oxidation? Material processes - Changing materials - Chemical reactions Learning Points Rusting is also called oxidation. A Twig Tidbit Film - Did you know? A fascinating...
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The brain and the body – True or false
True or false ... The human brain uses up 20% of the body's oxygen supply? Life processes - Body systems - The brain and body Learning Points The brain uses 20% of the body's oxygen supply. A Twig Tidbit Film - True or False? The...
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Plant growth – Odd one out
Four processes are shown, but which is the odd one out and is not necessary for germination? Life processes - Green plants - Plant growth A Twig Tidbit Film - Odd one out. The children have to work out which of four images is the odd one...
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Burning – Odd one out
Four images associated with burning are shown onscreen, but which is the odd one out and is not needed to start a fire? Material processes - Changing materials - Burning Learning Points An exothermic reaction releases heat energy. A Twig...
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The world's highest hospital
Venture to the world’s highest hospital, at Mount Everest's Base Camp. People and places - Physical geography - Mountains Learning Points There is less oxygen available to breathe at the top of a mountain. The Earth's crust is divided up...
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The Amazon rainforest
Find out how deforestation in the Amazon rainforest affects the whole planet, and what is being done to stop it disappearing completely. People and places - Human impact on the environment - Humans on Earth Learning Points Deforestation...
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You are one big chemical reaction
Did you know you are one big walking talking chemical reaction? Material processes - Changing materials - Chemical reactions Learning Points Chemical reactions happen inside the human body. Respiration is a chemical reaction that...
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Why is the Statue of Liberty green?
Did you know that the Statue of Liberty hasn't always been green? Material processes - Changing materials - Chemical reactions Learning Points Chemical reactions produce new substances. Chemical changes always involve two or more...
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What is air?
You may not think about it much, but air is everywhere and it is essential to life. Material processes - Solids, liquids and gases - Characteristics of air Learning Points Air is a mixture of gases including nitrogen and oxygen. Air...
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Smog - Air Pollution
Find out how harmful gases in the air can react together to create smog ... a form of air pollution. People and places - Human impact on the environment - Polluting the air Learning Points Smog is a mixture of harmful gases that react...
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The Heart - Circulatory System
Explanation of the circulatory system. Life processes - Body systems - The circulatory system Learning Points The heart is a strong muscle that pumps blood throughout the body. Arteries and veins carry blood around the body. A Twig...
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Follow a human breath
Follow the journey of a human breath. Life processes - Body systems - The respiratory system Learning Points As we inhale, air travels down the trachea to the lungs. Oxygen in the lungs passes through bronchioles and air sacs into the...
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What is burning?
What are the three factors needed to make something burn? Material processes - Changing materials - Burning Learning Points Burning is a chemical reaction. Burning requires oxygen, a fuel source and heat. An exothermic reaction releases...
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Mudskippers
Meet the very unusual mudskipper fish – it can walk on land! Life processes - Living processes - Living things Learning Points All living things react to their environment. All living things reproduce. All living things need nutrition...
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Germination - Seed Growth
Learn all about plant germination and the conditions that can affect its success. Life processes - Green plants - Plant growth Learning Points Germination is when a seed starts to grow into a new plant. Water, oxygen and the right...
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How does a fish breathe?
Find out how fish breathe underwater. Life processes - Body systems - The respiratory system Learning Points Every animal needs oxygen to survive. Fish have gills that absorb oxygen from water. A Twig Context Film. Reinforce and extend...
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Heart transplant
The story of one man's life-saving heart transplant operation. Life processes - Body systems - The circulatory system Learning Points If the heart stops working oxygenated blood won't move around the body. Each heart beat pumps five...
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Body systems
Find out how our body systems are interrelated. Life processes - Body systems - The brain and body Learning Points Respiration is the processing of oxygen in cells to produce energy and carbon dioxide. A Twig Curriculum Film. Delivering...
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Giant redwoods
The tallest trees on Earth have an amazing system to circulate water and nutrients. Life processes - Green plants - Parts of a plant Learning Points Leaves absorb sunlight. Root hairs absorb water and nutrients. Trunk transport water and...