It's In the Numbers

Weather versus climate: weather relates to short time periods while climate averages the weather of a period of many years. Scholars learn about average temperature and precipitation in various climate zones and then apply statistics...

Emerging biochemists more fully understand the flow of energy in ecosystems as they explore the laws of thermodynamics and relate them to energy transfer in food chains. They also investigate heat loss from the human body and how...

Ever wonder why old headstones in cemeteries are difficult to read? Learn about acid-base reactions and how these contribute to the defacing of statues and headstones and how improving the way we burn coal has decreased these effects.

What is motion and why does it often follow a straight line? Share the video with your class so they understand the answers to this question and others. Pupils participate in discussions on displacement, acceleration, time, velocity and...

Don't keep your physics class in the dark about night—introduce them to the concept with a short animated video! The narrator discusses how the Big Bang set our universe into an ever-expanding motion where the stars we observe now appear...

A video that demonstrates the process for cooling atoms launches a journey to comprehend physics. After watching the video, class members answer multiple-choice and short-answer questions to prepare for a whole-class discussion of the...

When scientists confirm new elements, do these elements always fit in on the periodic table where scientists expect? The second video in a series of 15 discusses how the elements are organized on the periodic table. The resource includes...

Flashy animation, superb narrative, and a touch of bad-hair-day humor explain the nature of chiral molecules in this five-minute feature. Viewers find out how chemist Jacobus Van't Hoff proposed that some saturated carbon molecules are...

Since an atom can't have a partial neutron, the atomic mass should always be a whole number, but it isn't! An interactive video lesson explains how the atomic mass number from the periodic table incorporates the isotopes of an element....

It's a small (nanotechnology) world after all! The first segment of a six-part series gives an overview of nanotechnology, its principles and applications, and shares some of the engineering applications of nanotechnology. A presentation...