PBS
The Raptor That Made Us Rethink Dinosaurs
In 1964, a paleontologist named John Ostrom unearthed some fascinating fossils from the mudstone of Montana. Its discovery set the stage for what’s known today as the Dinosaur Renaissance, a total re-thinking of what we thought we knew...
Be Smart
Why Are We Warm-Blooded?
A human with the metabolism of a hummingbird would need to eat about 80,000 calories a day to survive. That’s because staying warm by making your own heat takes a ton of energy. And that brings up a paradox, because creating your own...
SciShow
Why Aren't Mammals as Big as Dinosaurs?
Dinosaurs were huge—it's common knowledge. So why aren't modern mammals anywhere near that size? In this episode of SciShow, Hank gives a quick run-down of the reasons scientists think the land mammals of today are nowhere near the size...
Bozeman Science
Endothermic and Exothermic Reactions
In this video Paul Andersen explains how heat can be absorbed in endothermic or released in exothermic reactions. An energy diagram can be used to show energy movements in these reactions and temperature can be used to measure them...
TED-Ed
TED-ED: What triggers a chemical reaction? - Kareem Jarrah
Chemicals are in everything we see, and the reactions between them can look like anything from rust on a spoon to an explosion on your stovetop. But why do these reactions happen in the first place? Kareem Jarrah answers this question by...
Bozeman Science
Enthalpy of Reaction
In this video Paul Andersen explains how the enthalpy of a reaction can be released in an exothermic or consumed in an endothermic reaction. According to Hess's law if the reaction is reversed the sign of the enthalpy of reaction is also...
Curated Video
Vaporise
To change, or cause something to change, into gas or vapour. 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...
Curated Video
Thermal decomposition
The chemical breakdown of a compound into simpler substances when heated. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
Curated Video
Endothermic
A chemical reaction or process that absorbs heat from the surrroundings. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
Curated Video
Enthalpy change
The amount of heat energy gained or lost by a chemical system when a process or reaction takes place at constant pressure. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
Curated Video
Energy Change of Reactions
Some reactions take in energy and some release energy. Why? And what are some common examples of each type of reaction? Chemistry - Reactions - Learning Points. An energy change occurs when reactions take place. Exothermic reactions...
Curated Video
We Are All Made of Stars
Discover how elements are formed in the centre of stars, and how some elements are formed in even more spectacular conditions. Chemistry - Periodic Table - Learning Points. Most elements were created in space. At the beginning of the...
Curated Video
Endothermic Reaction
We demonstrate an endothermic reaction by mixing hydrated barium hydroxide with ammonium thiocyanate. When these two solids react they take heat from the surrounding air. Chemistry - Reactions - Learning Points. Breaking bonds takes in...
Curated Video
What is glass made of?
We use glass every day, but how is is made? Material processes - Changing materials - More chemical reactions Learning Points An endothermic reaction absorbs heat energy. Chemical reactions can change the properties of materials. A Twig...
Curated Video
¿Qué son las Reacciones Endotérmicas y Exotérmicas?
Las reacciones exotérmicas liberan energía al entorno, generalmente en forma de calor, como en una hoguera. Ejemplos incluyen la combustión, la neutralización y la respiración, y se detectan si aumenta la temperatura. Las reacciones...
Curated Video
एंडोथर्मिक और एक्सोथर्मिक रिएक्शन क्या हैं? | रासायनिक विज्ञान | FuseSchool Hindi
इस वीडियो में हम एग्ज़ॉथर्मिक और एंडॉथर्मिक प्रतिक्रियाओं के बीच के अंतर पर चर्चा करेंगे। एग्ज़ॉथर्मिक प्रतिक्रियाएं ऊर्जा को बाहर छोड़ती हैं, जिससे तापमान बढ़ता है, जबकि एंडॉथर्मिक प्रतिक्रियाएं ऊर्जा को अपने परिवेश से अवशोषित करती हैं,...
Wonderscape
Understanding Energy Changes in Chemical Reactions
Explore the concept of energy changes in chemical reactions, including exothermic and endothermic reactions. Learn how chemical reactions can either release or absorb energy in the form of heat or light, with examples ranging from baking...
Curated Video
GCSE Chemistry - Bond Energies #44 (Higher tier)
This video covers: - What bond energies are - That bond breaking is endothermic - That bond formation is exothermic - How to calculate bond energies - Two example calculations This video is suitable for: - Higher tier only - All exam...
Curated Video
GCSE Chemistry - Le Chatelier's Principle #50 (Higher Tier)
This video covers: - Le Chatelier's Principle - i.e. the idea that when a change is made to a system at equilibrium, the position of equilibrium moves to counteract the change that was made. - What happens when temperature is changed -...
Curated Video
GCSE Chemistry - Reversible Reactions and Equilibrium #49
This video covers the following - The difference between a normal reaction and a reversible reaction - What is meant by 'equilibrium' - What is meant by the 'position of equilibrium'
Curated Video
I WONDER - What Are The Different Types Of Chemical Reactions?
This video is answering the question of what are the different types of chemical reactions.
Curated Video
Endothermic and Exothermic Reactions
Endothermic and Exothermic Reactions investigates heat-generating reactions and heat-consuming reactions by defining exothermic and endothermic.
Curated Video
Calculating Energy Changes and Bond Energies in Chemical Reactions
The video explains how to calculate energy changes in chemical reactions by considering the energy required to break bonds and the energy released when bonds are formed. The video also introduces the concept of bond energy, which is the...
Curated Video
Introduction to Reversible Reactions and Equilibrium
This video explains the concept of reversible chemical reactions. It starts by introducing reversible reactions and providing an example of the reaction between ammonium chloride, ammonia, and hydrogen chloride. The video then explains...