Positively charged particles and free electrons are left behind after the collisions. Devices that are used to detect radioactivity are based on the ionizing ability of radiation. One such device is ...

There are more than 2,000 games available. Students can use these free online lessons to do hands-on, DIY science projects. They can also access free webinars (MEL Academy) where teachers explain ...

Inquiry in Action is a FREE teacher resource of fully-developed lesson plans in physical science for grades K-5. All Inquiry in Action Lessons: Are aligned to the Next Generation Science Standards ...