How Old Is Old?

How old is the plant? Here is a task that presents the exponential decay function for carbon 14 in a plant. Pupils use the function to estimate the amount of carbon 14 in the plant when it died and analyze the function to find what the...

Eight neat slides lead to the understanding of how geologists have determined Earth's age. Most of the slides are dedicated to explaining the absolute dating method of assessment. Color diagrams display radioactive isotopes and a graph...

How do you put 4.5 billion years into terms that young scholars can understand? Use your arms! Examine just how long our Earth has been around in a short video. The content includes the appearance of single-celled, then multicellular...

When three dimensions are available, why is our solar system shaped like a flattened disk? Find out how the conservation of angular momentum plays a role. Physics and space science learners alike will be blown away by this bit of...

How do we define a year? Science has multiple definitions depending on if you use a sidereal year, a tropical year, or an anomalous year. A helpful resource explains all three, as well as how the human body changes over the course of the...

How old is Earth and how do scientists know the answer? Throughout history, many researchers, scholars, and leaders answered this question with varying degrees of accuracy. The 20th episode of Crash Course History of Science introduces...

A timely resource illustrates the effects of the passing years on sedimentary rock formation! Young geologists discover just how long it takes to create shale, slate, and other sedimentary rocks. The interactive also shows...

Shake and shake the ketchup bottle, none will come, and then a lot will pour out! Finally, a scientific answer to the age-old question of why it is nearly impossible to get this coveted condiment out and onto your french fries! Along the...

Young scholars explore the aging process. Students examine the concept of age from a child's perspective and discuss that aging is relative. Young scholars read the book, How Old is Old? and engage in several different activities on age...

Take an elevator down under the surface of the skin! Animations show that new skin cells are formed and the old ones are shed in the epidermis, how melanin provides color and nerves and blood vessels reside in the dermis, and what the...