This live-action video program is about the word Density. The program is designed to reinforce and support a student's comprehension and retention of the word Density through use of video footage, photographs, diagrams and colorful,...

This nugget explains about the heat energy,chemical energy and its types,electrical energy, nuclear energy and the equivalence of mass and energy.

Let’s fly to Eukarytopia, the home of the eukaryotes! You can learn all about plants in the Garden of Babylon! This lesson will begin our series on eukaryotic cells. We’ll look at the structure of plant cells, focusing on components...

Atmosphere Set: 1. This clip examines the chemical composition and the layers of the atmosphere.

What are enzymes? Why they're nature's little factory workers. They chop up certain things! They build up others! Pretty amazing the kind of chemistry nature can do given enormous polypeptide chains with unfathomable variability and...

In this video we examine the process of digesting our food. We shall see how biological catalysts called enzymes break these food molecules apart and why they are necessary. Think of our food molecules as a train of trucks all coupled...

Muscle fibers, DNA and plastics are all examples of polymers. Watch this video to learn more.

This question has been bugging me for about 20 years. And, ultimately, it still bugs me...

This live-action video program is about the term change of state. The program is designed to reinforce and support a student's comprehension and retention of the term change of state through use of video footage, photographs, diagrams...

Plant Physiology and Chemistry Set: 3. This clip examines the chemical structure of chlorophyll and looks at where and how this molecule assists in carrying out photosynthesis.

Learn the basics about climate change and how burning fossil fuels adds extra carbon dioxide to the atmosphere, and how this then leads to climate change. Fossil fuels, like oil, coal and natural gas, are the remains of living things...

Learn about carbohydrates within the overall topic of organic chemistry.

In Part 1, learn the basics about Collision Theory and Reactions. Different reactions can happen at different rates. What is a collision theory and how does it relate to reactions? Find out more in this video!

An animation showing the life cycle of a star. Everything from the interstellar space, Interstellar clouds, pressure waves, protostars and protoplanets, the Hydrostatic equilibrium and at last the collapse of a star. Animated in virtual...

You must have wondered about it before, haven't you? How did life begin on earth? I mean the very first thing. The first unicellular organism, billions of years ago. Is it even possible? As it happens, our understanding of chemistry,...

We live in a time where there is much skepticism towards modern medicine. This stems purely from ignorance, however, and there are those who capitalize on this to sell an unbelievable array of alternative medicines that, almost without...

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...

It's not just animals that are made of cells, it's plants too! Plant cells are very similar to animal cells, but they have some stuff that animal cells don't, like chloroplasts, that allow for photosynthesis. Let's take a tour through a...

An acid is a substance that will dissociate in water to give a proton (or H+ ion) and a conjugate base. An acid is considered to be strong if dissociation nears 100%, and weak if dissociation is usually less than 1%. In this lesson, we...

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...

When a substance changes its state, heat energy is involved. This energy is used not to heat up the substance, but to separate the molecules from each other. This is known as specific latent heat. Specific latent heat is defined as the...

Learn all about the states of matter - solid, liquid and gas. We explain the concepts of freezing, melting, evaporation, and condensation, and discuss the reversibility of physical changes. We also distinguish between physical and...

We know about atoms and molecules and cells, so now we are ready to learn about complex multicellular life. Of course the multicellular species that is of the most interest to us is Homo sapiens, because that's us! The human body is...

Cell Structure and Function Set: 2. This clip introduces the structure and function of the components of the nucleus.