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Alkaline earth metal
A group of metals that form group two of the periodic table. 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...
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How Hot Is the Earth's Core?
Unreachable by man, scientists have developed a complex experiment to demonstrate the heat and pressure at the centre of the Earth. Earth Science - Geology - Learning Points. The Earth's core is a dense ball of iron and nickel. To...
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State of the Greenland Ice Sheet
Laser technology aboard aircraft has allowed scientists to measure the Greenland Ice Sheet, one of the largest bodies of ice in the world. Is it growing or shrinking? Earth Science - Human Impacts - Learning Points. NASA scientists...
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Changing States of Matter
Water can either be a solid, a liquid or a gas. How does matter change state? Chemistry - Atoms And Bonding - Learning Points. Ice, liquid water and steam all consist of exactly the same molecules. Evaporation occurs when the temperature...
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The Big Chill
Melting icecaps are threatening one of the most important currents in the world, the Great Ocean Conveyor. If it stopped, it could have devastating impacts on our climate. Earth Science - Human Impacts - Learning Points. The Great Ocean...
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Clathrate Gun Hypothesis
The largest volumes of methane on Earth are frozen deep underground. Learn how global warming could melt these stores and start the irreversible process predicted by the Clathrate Gun Hypothesis. Earth Science - Human Impacts - Learning...
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Salt: Salt and Ice
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...
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Melting
Melting is when a solid turns into a liquid. The world around us - Exploring materials - Freezing and melting Learning Points Some places on Earth, such as the Arctic, are so cold that seawater freezes during the cold winter months. When...
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Expanding oceans
Why are sea levels rising at twice the rate that scientists predicted? Material processes - Changing materials - Expansion and conduction Learning Points Thermal expansion is due to molecules gaining energy. The thermal expansion of ice...
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Condensation and freezing
Why do water drops form on cold windows and why does water freeze? Material processes - Solids, liquids and gases - Changes of state Learning Points Condensation is the change of state from gas to liquid. Freezing is the change of state...
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Very strange liquids
Not all liquids act the same ... some can behave very strangely indeed! Material processes - Solids, liquids and gases - Liquids Learning Points Liquids do not have a fixed shape. Non-Newtonian liquids change behaviour when a force is...
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Everyday liquids
What are the properties of a liquid? Material processes - Solids, liquids and gases - Liquids Learning Points Liquids do not have a fixed shape. The speed at which a liquid flows is known as viscosity. Liquids have fixed volume. The...
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Heat energy
Discover that heat energy can turn a solid metal into liquid. Physical processes - Energy and energy transfer - Heat and temperature Learning Points Heat energy always travels from a hotter to a cooler area. Heat energy causes molecules...
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Climate change
This film explores how the world's climate has changed over time and how human activities have accelerated this natural process. People and places -Environmental awareness and care - Environmental changes Learning Points Global warming...
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Changing state
Materials change state all the time, but how and why? Material processes - Solids, liquids and gases - Changes of state Learning Points Melting is the change of state from solid to liquid. Evaporation is the change of state from liquid...
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Cambios de Estado - Materia
En la Tierra, los materiales pueden existir como sólidos, líquidos o gases y cambiar de un estado a otro al calentarse o enfriarse, alterando sus propiedades. Procesos como evaporación, condensación, fusión y sublimación describen estas...
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द्रव्य की स्थिति के परिवर्तन | मामला | भौतिक विज्ञा | FuseSchool Hindi
यह वीडियो पदार्थ की तीन मुख्य अवस्थाओं (ठोस, तरल, गैस) और उनके बीच के संक्रमण के बारे में है। गर्मी के प्रभाव से, ठोस बर्फ पिघलकर तरल पानी में बदल जाती है, और जब तरल को गर्म किया जाता है, तो वह गैस में परिवर्तित हो जाता है। वीडियो में...
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Matter and its Construction: Heat of Fusion and Vaporization
By the end of this learning object, the student will be able to: Recognize the concept of heat of fusion and vaporization16331
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Coming to America
Dr. Forrester describes how immigrants from all over the world came to America to make up what is now a melting pot of American people. She describes why many of the immigrants came and what they found when they immigrated to the New World.
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The Day Henry Met…A Gondola
Henry meets an old worn out Gondola in a grotty boat yard. Henry learns all about boats and how they are used for transport for hundreds of years. Gondola has always wanted to cruise through the watery romantic streets of Venice to carry...
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GCSE Chemistry - States of Matter & Changing State #21
This video explains 'particle theory' and uses it to describe the 3 states of matter: solid, liquid and gas. It also covers how substances move between these states at the particle level. This video is suitable for: - All exam boards -...
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GCSE Chemistry - Properties of Simple Molecular Substances & Giant Covalent Structures #17
Covalent bonds are very strong can be used to make a range of substances from the very small 'Simple Molecular Substances' to the large 'Giant Covalent Structures'. Learn how their properties differ and why!
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GCSE Chemistry - What is a Polymer? Polymers / Monomers / Their Properties Explained #23
Everything you need to know about polymers! Polymers are large molecules made up of lots of repeating units called monomers. This video covers: how to identify them, how to draw them, and their properties.
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GCSE Chemistry - Purity and Formulations #62
In this video, you'll learn: - What the term 'purity' means - How we use physical and chemical tests to check for purity - The effect of purity on melting and boiling points - What the term 'formulation' means - Some common uses of...