Science Class

A Lead-free favorite of my (teenage) kids. [Note: my kids are science-geeks!]

A Lead-free favorite of my (teenage) kids. [Note: my kids are science-geeks!]

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Friday – December 16, 2022 My kids love science…and one aspect of their love for science is that they really love collecting “specimens” when we travel — which they bring home for subsequent examination, evaluation & analysis; cataloguing & archiving! Currently, Charlie and Avi are enjoying collecting sand and water samples from the various habitats they…

Understanding ppm vs. ppb vs. percent — what do the terms “parts per million,” and “parts per billion” mean?

Understanding ppm vs. ppb vs. percent — what do the terms “parts per million,” and “parts per billion” mean?

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For those new to this website: Tamara Rubin is a multiple-federal-award-winning independent advocate for childhood Lead poisoning prevention and consumer goods safety, and a documentary filmmaker. She is also a mother of Lead-poisoned children (two of her sons were acutely Lead-poisoned in 2005). Since 2009, Tamara has been using XRF technology (a scientific method used…