Explore the evolution of money from its origins in the barter system to the development of commodity money, representative money, and eventually fiat money. Understand the functions of money in the economy and how different forms of...

It explains Bohr's model of an atom and electron distribution in different orbits. It also talks about valency.

Overview of sublevels and shells in orbitals.

Early humans traded goods to get what they needed, but bartering was not practical when one person did not want or need what the other had to offer. Eventually money was invented to make economic exchanges easier and more practical....

Learn about the energy levels and electronic configurations of atoms of different elements in this video from the Properties of Matter chapter of the Virtual School GCSE Chemistry.

Learn the basics about Energy Levels and Electron Configuration. Where do you find energy levels? How do you recognize electron configuration? Find out more in this video!

Learn the basics about the covalent bonding of hydrogen, oxygen and nitrogen as a part of the overall topic of properties of matter. The noble gas structure and covalent bonding is also discussed.

A lot of the microbes we show you are completely naked, but the test amoeba is a bit more modest.

The Secret Things Living in Your Aquarium

For the first time, NSF-funded researchers at the University of California Santa Barbara have collected long-term evidence that links rising levels of carbon and changes in ocean chemistry in Antarctic waters to the inability of...

Learn the basics about covalent bonds, when learning about properties of matter. When similar atoms react, like non-metals combining with other non-metals, they share electrons. This is covalent bonding. Non-metals have shells of...

In this week’s episode we explore origami-inspired devices, examine family technology rules, and finally we examine how changing ocean chemistry may threaten the Antarctic food chain.

The diverse groups of microorganisms in the Kingdom Protista are illustrated in this video. Microscopic views compare the main categories of protists. the different phyla of algae are also discussed. Other terminology includes: protozoa,...