Curated Video
Stomach Acid and Antacid
We use the enzyme pepsin and hydrochloric acid to simulate the conditions within the stomach in two boiling tubes. Cooked egg whites are ground and added to two boiling tubes of hydrochloric acid, but one is mixed with a crushed antacid...
Curated Video
Van de Graaff Generator
We use a Van de Graaff generator to investigate static electricity. The generator is turned on and we see a spark move between the two domes. We then place a wig on the main dome and see the hair rise as the charge builds and the hairs...
Curated Video
Agar Cube Diffusion
We use coloured agar cubes to see how different shapes change the rate of diffusion. The cubes are made using sodium hydroxide and phenolphthalein indicator to give them a pink colour. When these are added to hydrochloric acid, the...
Curated Video
Mass Tourism: Case Study
Tourism is now a major industry in Thailand due to its rich culture and exotic climate. However, mass tourism puts extraordinary pressure on local resources and creates problems of overcrowding and pollution. How can Thailand manage...
Curated Video
Inventions to Save the Planet
Discover some geo-engineering techniques that scientists are developing to manipulate Earth's climate. What are they and how would they work? Earth Science - Human Impacts - Learning Points. Geo-engineering strives to use technology to...
Curated Video
The Moon and Spring Tides
How the Moon affects daily tides and drives extreme spring tides, when the Sun and Moon align. Physics - Our Solar System - Learning Points. The Moon creates and controls the tides. Its gravitational pull causes ocean water to bulge...
Curated Video
Glaciers - Moving Ice Masses
Glaciers are a destructive force, moving slowly across landscapes, reshaping them as they go. Earth Science - Geology - Learning Points. Over three-quarters of Earth's fresh water is locked in frozen reservoirs, known as glaciers....
Curated Video
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...
Curated Video
Fluorescent
A fluorescent substance is one that absorbs light at one wavelength and re-emits the energy as light at another wavelength, usually longer, a phenomenon called fluorescence. A Twig Science Glossary Film. Key scientific terms defined in...
Curated Video
Electron Withdrawal (-M): The Nitrobenzene Effect
The -M effect involves electron withdrawal through resonance. In nitrobenzene, the nitro group pulls electron density away from the benzene ring, decreasing electron density and making the ring less reactive in electrophilic substitution...
Curated Video
Mesomeric Effect (+M): How Phenol Releases Electrons
The +M effect refers to electron donation through resonance, as seen in phenol where the hydroxyl group donates electrons into the benzene ring. This increases electron density in the ring and impacts reactivity and acidity
Curated Video
How Basic is Your Molecule? The Role of Inductive Effect
The inductive effect plays a significant role in determining a molecule's basicity. Electron-withdrawing groups decrease basicity by pulling electron density away from the nitrogen or oxygen atom, weakening its ability to accept protons....
Curated Video
Inductive Effect and Dipole Moment: Molecular Attraction Revealed
The inductive effect can also influence a molecule’s dipole moment, which measures the separation of charges within a molecule. Electron-withdrawing groups create a stronger dipole by pulling electron density away from less...
Curated Video
Electron Push and Pull: Inductive Effects Explained
The inductive effect is all about how atoms in a molecule affect electron distribution. Electron-withdrawing groups, like halogens, pull electrons through sigma bonds, reducing electron density in adjacent atoms. Conversely,...
Curated Video
Inductive Effect: The Hidden Forces in Molecules
The inductive effect refers to the electron-donating or withdrawing influence that substituents exert on a molecule through sigma bonds. Electronegative atoms or groups pull electron density away from the rest of the molecule, while...
Wonderscape
The Environmental and Human Costs of Industrial Cobalt Mining in the DRC
Delve into the complexities of cobalt mining in the Democratic Republic of the Congo (DRC), where industrial and artisanal mining intersect. Learn about the environmental damage, displacement of communities, and health risks associated...
Wonderscape
Racial and Prison Gerrymandering: Impact on Minority Voters
This video explains how racial and prison gerrymandering affect minority communities' political representation. Learn about cases like North Carolina's 2011 map and Virginia's redistricting case, as well as the concept of prison-based...
Wonderscape
The Impact of Rising Temperatures: Droughts, Wildfires, and Extreme Weather
This video explains the ripple effects of rising global temperatures, including more frequent droughts, wildfires, and extreme weather events like hurricanes. Discover how changes in the climate affect water availability, agriculture,...
Curated Video
Why Do Clothes Feel Stiff When Air Dried But Soft Coming From the Dryer?
The difference between air-drying and tumble-drying is that air-drying keeps the cellulose fibers from reforming their hydrogen bonds more effectively, which makes the towel feel a bit fluffy. Tumble drying, on the other hand, causes the...
Wonderscape
Using Inference and Cause and Effect Clues in Reading
Learn how to utilize inference clues, which require reasoning skills and background knowledge, to deduce the meaning of unknown words in context. Explore cause and effect clues, signaled by words like "because" or "due to," to understand...
Wonderscape
Flight Forces: Exploring Weight in Aviation
Explore the concept of weight as one of the four fundamental forces acting on airplanes during flight. Learn how weight, the gravitational force pulling objects toward the Earth's center, interacts with lift to determine an aircraft's...
Curated Video
How Foreign Mercenaries Shaped Early Britain and the Legend of King Arthur
The Britons, facing relentless raids, summoned the help of foreign mercenaries from Pagan Germanic tribes, including the Jutes, Angles, and Saxons. Initially, these warriors defended their British employers but later turned against them,...
Curated Video
Football Shorts - Episode 68 ENGLAND COACH FAILS
STEVE MCCLAREN HAD BEEN IN CHARGE OF THE ENGLAND TEAM SINCE HE TOOK OVER FROM SVEN GORAN-ERIKSSON JUST BEFORE THE EURO 2008 QUALIFIERS STARTED. HIS FIRST MAJOR DECISION WAS TO DUMP POPULAR CAPTAIN DAVID BECKHAM. TERRY VENABLES WAS...
Curated Video
Mastering Tailwind CSS 3.0 - Build Two Dynamic Projects - Create Stories Section
Learn how to recreate the captivating stories section within the Instagram UI clone, gaining valuable insights into its construction and adding a dynamic element to your project.