In this video Paul Andersen describes the lipids (of the fats). He explains how they are an important source of energy but are also required to cell membranes. He explains how the hydrocarbon tails in triglycerides contain energy...

Ever wonder how lightning works? Scientists are still figuring it out, but what we do know is fascinating. Learn about positive and negative lightning, red sprites, blue jets, and ball lightning in this episode of SciShow!

Mr. Andersen explains why radiation occurs and describes the major types of radiation. He also shows how alpha, beta, and gamma radiation affect the nucleus of a radioactive atom. Nuclear equations are also discussed.

In this video Paul Andersen explains how the charge distribution can be affected my electric forces produced by a charged object. In an insulator charges are fixed but in conductors the charges can move. Induction occurs when the...

A SciShow Kids viewer wants to know, 'Why do lightning and thunder happen?' Get your raincoat, because Jessi will take you inside a thunderstorm to give you the answer!

Moving on to our unit on the Physics of Electricity, it's time to talk about charge. What is charge? Is there a positive and negative charge? What do those things mean? In this episode, Shini talks about electrostatic forces, electrical...

In this video Paul Andersen explains how covalent network solids form elementally (like graphite) or by combining multiple nonmetals (like quartz). Covalent network solids contain elements from the carbon group because they have four...

Paul Andersen begins with a brief description of NASA discoveries related to Mars, Mercury and water. He then explains why water is required for life. He finally uses a simulation to show you why water acts as a wonderful solvent and...

In this video Paul Andersen explains how covalent bonds form between atoms that are sharing electrons. Atoms that have the same electronegativity create nonpolar covalent bonds. The bond energy and bond length can be determined by...

How did we get here? Well, in terms of Atomic Chemistry, Hank takes us on a tour of the folks that were part of the long chain of other folks who helped us get to these deeper understandings of the world. From Leucippus to...

Mr. Andersen details the history of modern atomic theory.

In this video, we explore equipotential surfaces and how they connect to electric potential and electric field lines. Using clear visuals and step-by-step reasoning, Mr. P helps you see how electric field lines are always perpendicular...

“Static Electricity” demonstrates how rubbing some materials together makes static electricity.

Pupil outcome: I can describe how objects with a positive or negative charge attract or repel other charged objects. Key learning points: - Some objects can be charged by rubbing with certain materials. - Objects with a static electric...

Pupil outcome: I can describe what charges are and how they are transferred between some objects, giving them opposite charges. Key learning points: - Atoms contain positive and negative electric charges. - The particles in atoms with a...

Isoelectric focusing (IEF) is a high-resolution technique for separating proteins based on their isoelectric points, utilizing electric fields to focus molecules into sharp zones within a pH gradient. The pH gradient, created using...

SDS–PAGE is a widely used technique for qualitative analysis of protein mixtures, particularly during protein purification. Proteins are denatured using SDS and β-mercaptoethanol, which linearize the molecules and impart a uniform...

This video explains the formation of thunderstorms and how lightning and thunder are created. It describes how water vapor in the sky condenses into clouds, and when these clouds collide, electrical charges are produced. When these...

In this video, students will learn about atomic theory, atomic structure and how the atom is put together. This will include learning about the different subatomic particles, protons, neutrons and electrons, that make up the atom! This...

Ions are all around you and in many of the products and substances you encounter on a daily basis. Being able to determine the identity and difference between cations and anions is important for success in chemistry and physical science....

Cathode Rays: Key Properties

• Straight-Line Travel: Cathode rays travel in straight lines, casting sharp sha
dows.
• Negatively Charged: Composed of negatively charged particles, specifically electrons, deflected by...

Formal Charge Made Simple: A Guide to Molecular Stability Formal charge is a bookkeeping tool used to estimate the charge distribution within a molecule. It is calculated by comparing the number of valence electrons in an atom's free...

The charge that an object has as a result of an excess of electrons.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

A fundamental property of matter that means all particles are either positive, negative, or neutral.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and...