We’re going to see a type of motion over and over again because it’s all over the microcosmos, found in and around many different types of organisms. And this kind of random motion may seem almost too trivial to discuss, but this motion...

In this section, I talk about the properties of water, and what makes it unique. I talk about hydrogen bonds that result from the polar nature of water and why ice floats.



I also deal with diffusion and go into the 3 factors...

Can anything travel faster than the speed of light? Is it even possible for something to undertake the “speed of light” travel? And what if something can actually travel faster than light? What is Cherenkov radiation and how is it...

This video explores the use of desalination as a potential solution for managing water resources in Southern California and other coastal communities. It discusses the challenges of protecting marine ecosystems and the energy needed for...

It illustrates the method of balancing redox reactions using oxidation number method and half reaction method.

The video explains the scientific reason behind the blue color of the ocean and how it differs from the blue color of the sky. It also touches on the adaptation of organisms living in deep waters and the variations of ocean colors due to...

We know about solutions and solubility, but we have typically examined solid or liquid solutes dissolved in a liquid solvent. Did you know that gases can also be dissolved in liquids? Their solubilities depend heavily on temperature, so...

This human body video lesson is all about detergents and how they work. Students will love this engaging and interactive video as they learn about science they can do at home.

It describes the mechanism of ascent of sap by the theories of root pressure and transpirational pull. It explains the cohesion-tension-transpiration pull model of water transport.

Xylem: Upward Water Movement in Plants: This clip explains the role of xylem in the upward movement of water in plants.

What are the unique properties of water? What are the freezing and boiling points of water? Properties Of Water, Part 2

Microwave ovens use radio waves to quickly and efficiently cook food by agitating water molecules and generating heat at the atomic level. The waves can pass through certain materials such as plastic, glass, and ceramic, making heating...

Transpiration is the evaporation of water from the aerial parts of a plant (so the leaves and stems). By water evaporating out of these parts - mostly the leaves, a suction pressure is created which draws water up through the plant. This...

Yes, I know moles are adorable furry creatures. This is a different kind of mole! A numerical mole. And we need to understand them to be able to make predictions about reactions. Let Professor Dave take you through the finer points.

We know about acids and bases, and we know about acid-base reactions, so what is a neutralization reaction?

The video is about osmosis, a type of diffusion in which water molecules move from a dilute solution to a concentrated solution through a partially permeable membrane. The video explains what a partially permeable membrane is and how it...

The science that makes ice slippery also makes the Olympic Winter Games possible. But exactly what makes ice slippery? Ken Golden, a mathematician at the University of Utah, explains how the unique surface of ice makes the slide and...

What are electrolytes? Yes, they're what plants crave. But they are also ionic solids dissociated in solution, such that they can conduct electrical current. Learn about solutions!

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What is it that separates what's inside a cell from what's outside of a cell? Why, that's the cell membrane. What's it made out of? How does it work? How do molecules get in and out of the cell? These are super-important concepts! Let's...

In this video we are going to discover how cells take in useful substances and remove waste using three methods of transportation: diffusion, osmosis and then in the second part we will look at active transport. The exchange of materials...

Liquids have some very interesting properties, by virtue of the intermolecular forces they make, both between molecules of the liquid and those between the liquid and some other material they are in contact with. Let's learn about...

What's the difference between a physical change and a chemical change? What are elements, compounds, pure substances, and mixtures? So many definitions to learn! Don't worry, Professor Dave will take you through the details.