When was the year 0? Scholars view a short video clip on the history of humanity to determine just when to mark the start of human time. They analyze how the human population changed the earth and the structures of humanity, ultimately...

Mr. Khan uses the metaphor of a car to help explain the change in the direction of waves as they hit a boundary between two mediums. He then goes on to explain the relationship between the earth's structure and density and the waves'...

In 1895, Konstantin Tiolkovsky proposed the concept of a space elevator. It's now over 100 years later and scientists working toward the concept still aren't sure it is possible. The video explains the concept, the benefit, and the many...

Ever wonder why oil and water don't mix? Or why washing butter off of your hands is difficult? A video explores the different types of molecules, reviews charge and geometric asymmetry, and covers why water is one of the best...

We find sand on beaches, sand dunes, timers, and in hydraulic fracturing, but what exactly is it? The video discusses the mineral that composes the majority of sand on the planet. It also explains how it forms and why it ends up near...

Scientists try to understand the origins of life, and answers to these questions might be found during our lifetime. The fourth video in a 16-part series explains the earliest forms of life on Earth and their development. It covers...

This rock is on a roll! Introduce young geologists and environmentalists to the many uses of limestone using the fifth installment in a series of seven. Illustrate the components and properties of cement, mortar, and concrete,...

Scientists study the gut bacteria in ants to better understand their digestive process. Brain Scoop presents the proper way to dissect ants as part of their Insects playlist. The video shows the steps and explains why each is necessary...

Evolution is a theory but thank goodness gravity is a law. What is the theory of evolution and what are the facts supporting this theory? Here's a short video that explains how fossils, homologous structures, biogeography, and direct...

The hydrogen in your body is exactly the same as the hydrogen in the sun. The video explains just how small an atom is and offers comparisons, such as the one above, to help facilitate understanding. It also presents the current model of...

Currently, the tallest mountain on Earth is Mount Everest at 8,848 meters above sea level. The video discusses how tall a mountain might reach based on gravity, rock density, and other factors such as plate tectonics and erosion. 

Explore the history of taxonomy, the naming of organisms, with a video about Linnaeus and his classification system that is still used by scientists today to show the evolutionary relationships among organisms. 

A video starts by defining an ecosystem. It expands on the concept by covering trophic structure, primary producers, primary consumers, secondary consumers, tertiary consumers, detrivores, and bioaccumulation. 

Protecting buildings, bridges, and roadways from damage during an earthquake is an important task for engineers. Discover how one lab goes about testing the safety of existing and yet-to-be-built structures with a short video. See some...

What are those shiny things that people are installing on the roofs of their houses? Learn about the structure, function, and logistics of solar panels, as well as the challenges of using the sun's energy as our exclusive power source on...

If H2O is water and H2O2 is hydrogen peroxide, what is H2O4? Drinking, bathing, and cooking among others. Viewers of a short video explore water through its molecular structure, its ability to stick to itself through adhesion (cohesion...

Your class will never believe that their gold jewelry originated in outer space, but it's true! Learn about the way Earth's gold supply originated in a supernova and became integrated with our planet's terrain with a short, informative...

Where does that wrapper go after you throw it away? Most take the disposal of garbage for granted! An interesting lesson describes the structural requirements of a landfill and the special considerations that help keep groundwater safe....

Discussions of DNA occur in Jurassic Park, X-men, Dexter, and CSI, yet many don't fully understand it. The video explains what DNA is, where it is located, and how it forms proteins. The chemistry of life becomes understandable through...

Imagine building a 49 foot dam with no cranes, trucks, or earth-movers. Narrated by Peter Weller, part one of a 10-part History Channel series on the feats of early Egyptian engineers, looks at the first dam in recorded world history....

Address types of diversity, conservation biology, and restoration ecology. A video also includes small population conservation, declining population conservation, structural restoration, bioremediation, biological augmentation,...

Winds that flow at high altitudes for many miles, sometimes around the entire Earth, obtained the name jet streams. Scholars view three different visualizations of jet streams: one focusing on North America, one focusing on Asia, and the...

Structure of the Earth - crust, mantle, core

Explains in more detail the different layers that make up the structure of the Earth. [9:33]