Carbon dating transformed fields like archeology and paleontology, but its use might be in danger.

In this video Paul Andersen discusses the technology, advantages and disadvantages of six sources of renewable energy; biomass, hydroelectric, solar, geothermal wind, and hydrogen. He also explains how changes in the storage and flow of...

Composting becomes more widespread and accessible all the time, keeping millions of tons of food waste from ending up in landfills every year. But there is one quirk of some composting programs that can be a little annoying: they don't...

It's pi day! Hank explains why this irrational number is important to scientists, and discusses a bit of a controversy that surrounds it.

In this video Paul Andersen shows conceptual thinking in a mini-lesson on proportional relationships. TERMS Quantities - the amount (or number) of a thing Proportional relationship - relation of one dataset to another dataset Directly -...

Like many heroes of Greek myths, the philosopher Hippasus was rumored to have been mortally punished by the gods. But what was his crime? Did he murder guests or disrupt a sacred ritual? No, Hippasus's transgression was mathematically...

Why Do We Have More Boys Than Girls

Paul Andersen explains how pigments can be separated using chromatography. He shows how you can calculate the Rf value for each pigment. He then explains how you can measure the rate of photosynthesis using leaf chads and water...

After many adventures in Wonderland, Alice has once again found herself in the court of the temperamental Queen of Hearts. She's about to pass through the garden undetected, when she overhears the king and queen arguing that 64 is the...

Hank introduces us to the most beautiful numbers in nature - the Fibonacci sequence.

In this video Paul Andersen explains how the reaction quotient is used to determine the progress of a reversible reaction. The reaction quotient (Q) is the ratio of the concentration of products to the concentration of reactants. The...

A bit of the history behind how we came to use the symbol "pi" to represent what it does today, and how Euler used it to refer to several different circle constants.

Paul Andersen introduces the Punnett Square as a a powerful tool in genetic analysis. He tries to address major misconceptions that students have when use a Punnett Square. He gives a number of examples of monohybrid crosses and one...

It's an increasingly common sight in hospitals around the world: a nurse measures our height, weight, blood pressure, and attaches a glowing plastic clip to our finger. Suddenly, a digital screen reads out the oxygen level in our...

In this video Paul Andersen explains how elements and molecules are made of atoms. In a pure sample of a pure substance the average mass remains the same. If more than one atom is found in a molecule the ration of average masses...

In this shorts video we will determine scale using scale drawings and ratios. We will draw a picture to represent the drawing and the real world building. We will then write the ratio of drawing to building. We will identify the scale...

In this math video we will find unit rate using a table. We will be given a relationship where one quantity is a fraction. We will set up and use a table to find the unit rate. We will find the reciprocal and multiply the fractional...

In this math video we will write and simplify a complex fraction to find unit rate. We are given a relationship and asked to find the unit rate. We will write the relationship as a ratio in fraction form. Since one of the quantities...

In this video, we explore rational numbers and how to identify values within a given range on a number line. The problem asks: Which rational number is greater than -4 and less than 0?
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We’ll start by defining rational...

In this math video we will be writing ratios to represent relationships. We will be presented with a real world relationship between a set of marbles with two different colors and quantities. We will identify part to whole, part to...

In this video, the importance of understanding composition in photography is discussed to effectively direct the viewer's attention and highlight key elements in a photo. The video covers various composition rules such as the rule of...

A video entitled "Testing Graphing" which shows how to use a graph to test if ratios are proportional.

A video entitled "Zeros" which shows how to find key features of a rational function in order to graph it.

A video entitled "Similar Figures Lengths" which shows how to use proportions to find side lengths in similar figures.