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...

It doesn't matter how old you are or where you live, you can help protect the environment. Created in 2005 for World Environment Day, the agreement shows that the simple steps one can take to make a change have stayed the same, despite...

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...

Which makes a better name for a new species: Hermit Crab Caterpillar or Sir Leafs-a-Lot? Exploring a rainforest in Peru, the video helps viewers discover a unique species as part of a larger biology playlist. As scientists learn more...

Dry erase markers work on desks, doors (made of shiny particle board), and even mirrors! A funny video explores why dry erase markers leave behind marks when used. The narrator explains what the markers are made of, specifically the...

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

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...

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...

Have you ever wondered how clouds float in the sky, or why they seem to change so much in just a few minutes. Watch a short video about the way clouds are identified and named, and how they are affected by the Earth's conditions.