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Teachable Moments

Maintaining a Natural Sea Environment

Maintaining a Natural Sea Environment: We learn how the nitrogen cycle works under water to help employees maintain a natural sea environment, including the impact of temperature, pH and the...

Mechanical Advantage

A $12 million crane capable of lifting 78 tons is the machine we utilize in this engineering Teachable Moment, using pulleys and levers to explain Mechanical Advantage.


The odds are pretty good that you've used Metadata. So now is a good time to find out exactly what it is.

Monocultural vs Polycultural

We explore the differences between Mono-cultural and Poly-cultural farming.

Mutation and Antibotic Resistance

Definition and description of mutation and antibiotic resistance.

Newton's First Law

We get a little background on Sir Isaac Newton, along with a detailed look at his First Law of Motion.

Newton's Second Law

A detailed look at Newton's Second Law of Motion, which states that a force acting on a body is equal to the acceleration of that body times its mass.

Nitrogen and Photosynthesis

A definition and explanation of nitrogen and photosynthesis.

Organic Chemistry

We define Organic Chemistry, along with Hydrolysis and Synthesis. And we explain how these things help create new flavors.


Our expert explains why fish thrive in salt water, including an explanation of osmoregulation, as well as the roles of osmosis and active transport.


This content was developed under a grant from the U.S. Department of Education. However, this content does not necessarily represent the policy of the U.S. Department of Education, and you should not assume endorsement by the Federal Government.