Science ABC
Rancidity: Why Do Foods Turn Rancid?
Rancidity refers to the complete or incomplete hydrolysis or oxidation of fats and oils when exposed to air, light, moisture, and bacterial activity; this generally occurs in food items, making them undesirable for consumption. In more...
Science ABC
How Can Animals Drink Water From Dirty Ponds And Not Get Sick?
Forests are not usually teeming with water bodies. In other words, there are only a handful of lakes, ponds, or other small bodies of water that quench the thirst of a lot of animals that live in nearby wildlife areas. As animals...
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What is pasteurization?
Pasteurization or pasteurisation is a food preservation technique used to eliminate pathogens and extend shelf life. But how does pasteurization work? What foods are pasteurized? And why should we care about it? In this video, we will...
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Decomposition
The process by which dead organic matter is broken down into simpler chemicals and dispersed. 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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Topsoil
The uppermost 5 to 20cm of soil, with a high concentration of organic matter and microorganisms, where almost all of the biological activity in soil takes place. A Twig Science Glossary Film. Key scientific terms defined in just 60...
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Multicellular
Made up of more than one cell. 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...
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Fermentation: Converting Carbohydrates into Other Products
The process by which microorganisms can convert carbohydrates into other products. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...
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Salt: Food Preservative
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...
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Germs and Hygiene
Explore where germs are found, how they can affect us, and how basic hygiene can help us avoid becoming unwell. Biology - Healthy Living - Learning Points. Pathogens are microbes that cause disease. Good hygiene is the best way to limit...
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The Carbon Cycle
Through organic matter, rocks and the oceans, the element central to all life on Earth is constantly on the move. Earth Science - Earth's Resources - Learning Points. The carbon cycle is a transfer of carbon between living matter and the...
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Microbes in Milk
We examine the number of microorganisms in different types of milk using resazurin indicator. Samples of pasteurised milk, UHT milk and powdered milk are left in the open for three days before resazurin indicator is added and the samples...
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Fermentation: The Chemical Process Behind Everyday Foods
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...
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Microorganisms – Jigsaw
What is it? ... It's cheese! Life processes - Humans and other animals - Microorganisms A Twig Tidbit Film - Jigsaw. An image is slowly revealed as pieces of the jigsaw are removed. The children have to identify it.
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Microorganisms – Did you know?
Did you know that microorganisms were the first forms of life on Earth? Life processes - Humans and other animals - Microorganisms Learning Points The first forms of life were microorganisms. A Twig Tidbit Film - Did you know? A...
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Microorganisms – True or false
True or false ... Life on Earth could not exist without microorganisms? Life processes - Humans and other animals - Microorganisms Learning Points Life on Earth could not exist without microorganisms. A Twig Tidbit Film - True or False?...
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Reduce, reuse, recycle – Did you know?
Did you know that a compost toilet also coverts human waste into fertiliser? People and places - Environmental awareness and care - Reduce, reuse, recycle Learning Points Human waste can be used as a fertiliser. A Twig Tidbit Film - Did...
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Reducing the spread of disease – Odd one out
Four types of ailment are shown, but which one is not a disease? Life processes - Humans and other animals - Reducing the spread of disease Learning Points Hay fever is an allergy to pollen and not an infection. A Twig Tidbit Film - Odd...
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Microorganisms – Odd one out
Four products are shown, but which one is not made using microorganisms? Life processes - Humans and other animals - Microorganisms Learning Points Microorganisms help make some foods. A Twig Tidbit Film - Odd one out. The children have...
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Journey to the abyss
Plunge to the deepest and most difficult place to live on Earth. People and places - Physical geography - Climate Learning Points A biome's unique climate means that only particular plants and animals can survive there. Temperature and...
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Landfills
Most of the world's waste ends up in landfills – what effect is this having on our environment? People and places - Human impact on the environment - Polluting the land Learning Points A landfill is a hole in the ground that waste is...
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Plastic fantastic
In this film types of synthetic plastics are examined ... including biodegradable plastics known as bioplastics. People and places - Environmental awareness and care - Natural and synthetic materials Learning Points Bioplastics are made...
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Filtration on the ISS
How do astronauts aboard the International Space Station drink water recycled from their own urine? Material processes - Separating mixtures - Separation by filtration Learning Points Filtration can be used to purify liquids. Filtration...
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Biodegradable and non-biodegradable materials
Find out the difference between biodegradable and non-biodegradable materials. People and places -Environmental awareness and care - Natural and synthetic materials Learning Points Biodegradable material can be broken down by...
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Water pollution
Life on Earth could not exist without water. However, human activities can cause water pollution. How can we prevent this? People and places -Human impact on the environment - Polluting our water Learning Points Human activity can...