Professor Dave Explains
Acids and Bases, pH and pOH
We've all heard the terms acid and base. What do these mean? Don't just tell me about pH, silly. What structural detail makes a molecule an acid or a base? You don't know? Well, you'd better watch this then. You don't want to be...
Let's Tute
Why is the Ocean Blue?
This video explains why the ocean appears blue. It is because the water molecules in the ocean absorb all colors except for blue, which is reflected back to our eyes. As we go deeper into the ocean, the red part of the spectrum is...
Professor Dave Explains
Calculating the Formulas of Hydrated Salts
Some ionic compounds are coordinated to a specific number of water molecules in solution. But how many? How can we find out? We can't see molecules! Whatever will we do? Something very clever, as it turns out. Take a look!
Curated Video
Transport of Substances in and out of Cells: Diffusion, Osmosis, and Active Transport
In this video, the concept of transport of substances into and out of cells is explained. The different ways in which this process occurs are discussed, including diffusion, osmosis, and active transport. The importance of surface area...
Curated Video
The Consequences of Osmosis
The video is a lecture presentation discussing the consequences of osmosis. The presenter explains what osmosis is and how it works, with a focus on the movement of water molecules through partially permeable membranes. They also explain...
Higgsino Physics
How a Drinking Bird Toy Works
This is how a dipping bird toy/ drinking bird / dunking bird works explained. Explained with animations. A drinking bird works by cooling of the head via. evaporative cooling. That will cause the liquid (dichlormethane) inside the glass...
Physics Girl
This Weird Straw Effect | EVERYDAY MYSTERIES
When you look through a straw in water something strange happens as you move it up and down.
Curated Video
Do Microwaves Interfere With WiFi Signals?
Yes. Microwaves and radio waves are physically the same, i.e. both are forms of electromagnetic radiation. Some microwave rays can leak out and interfere with WiFi signals. We are basically constantly surrounded by electromagnetic...
Schooling Online
Chemistry Properties and Structure of Matter: Properties of Matter - Naming Hydrated Salts
This lesson will explain the differences between hydrated and anhydrous salts, including how to write their names and chemical formulae.
Definitions included: hydrated salt, water of crystallisation, anhydrous, anhydrate, aqueous salt
Curated Video
Methods of Estimating and Environmental Factors Affecting Transpiration in Plants
This video explains what transpiration is, how it can be estimated through experiments measuring the uptake of water by plants or the mass of water lost by the plants, and how changes in environmental conditions such as temperature,...
Journey to the Microcosmos
Mysterious Jiggly Crystals and Other Intracellular Structures
Let's journey deep into the cells themselves to take a look at some of the structures that keep cells alive and others that do... something... that we'll figure out someday... probably.
EarthEcho International
Engineering Solutions for Ocean Acidification
The video discusses the issue of ocean acidification and its impact on marine ecosystems and human health. It also highlights the work of scientists and organizations, including the XPRIZE Foundation, in developing tools to measure ocean...
Catalyst University
Type II Alveolar Cells | Pulmonary Surfactant
Type II Alveolar Cells | Pulmonary Surfactant
Curated Video
Investigating Temperature Changes in Chemical Reactions
The video is a tutorial on how to investigate temperature changes in chemical reactions, specifically focusing on the concepts of exothermic and endothermic reactions. The video explains the definition of the two terms and provides...
Curated Video
Understanding the Process of Transpiration and Water Absorption in Plants
This video explains the process of transpiration in plants and how water is absorbed by specialized root hair cells. The video first defines transpiration as the loss of water from the surface of a plant and describes how leaves lose...
Curated Video
The Osmosis Experiment: Theory, Procedure, and Results
The video is a lecture presentation on the topic of osmosis experiment. The presenter defines osmosis as the diffusion of water molecules from a dilute solution to a concentrated solution through a partially permeable membrane. The...
Curated Video
Diffusion: How Substances Move In and Out of Cells
This video explains how substances move in and out of cells via diffusion, which is the net movement of particles from an area of high concentration to an area of low concentration. The video first defines diffusion and illustrates it...
Catalyst University
Superoxides and Superoxide Dismutase: Physiology, Biochemistry, and Inorganic Mechanism
Superoxides and Superoxide Dismutase: Physiology, Biochemistry, and Inorganic Mechanism
Tumble Science Podcast for Kids
How Snow Is Made
The phrase “no two snowflakes are alike” is actually scientifically accurate. Snow forms high in the atmosphere, and despite its uniform appearance, each snowflake is different based upon where and how it was formed. Although snowflakes...
Catalyst University
Dopachrome Tautomerase: Physiology, Biochemistry, and Mechanism
Dopachrome Tautomerase: Physiology, Biochemistry, and Mechanism
Curated Video
Analyzing Osmosis Experiment Results and Estimating Sugar Concentration in a Potato Cell
This video is the second of two lectures on osmosis experiments. The presenter discusses how to process and analyze the results obtained in the first presentation and estimate the sugar concentration in a potato cell. The presenter...
Professor Dave Explains
Balancing Redox Reactions in Acidic and Basic Conditions
We know that redox reactions are ones that involve electron transfer. Something is oxidized, and something else is reduced. But these reactions can be tricky to balance when surrounding water molecules are involved in the reaction. Let's...
NASA
Small Steps, Giant Leaps: Episode 58, SOFIA Airborne Observatory Small Steps, Giant Leaps
SOFIA Project Scientist Naseem Rangwala discusses the Stratospheric Observatory for Infrared Astronomy.