Curated OER
Changes of State
In this states of matter worksheet, students are given 5 diagrams showing particles of matter and students predict the temperatures of each and the reasoning for their prediction given 5 different temperature to choose...
American Chemical Society
Middle School Chemistry: Periodic Table
Young scholars explore the periodic table and learn the basic information given for elements: the name, symbol, atomic number, and atomic mass for each element.
American Chemical Society
Middle School Chemistry: Molecules Matter
Learners observe and discuss water on the molecular level using the idea that water is composed of tiny molecules that are attracted to one another.
Nobel Media AB
The Nobel Prize: Nobel Prize in Physics 1943 Award Ceremony Speech
At this site read Professor E. Hulthen's "account of Stern's and Rabi's works," and contributions to the study of molecular rays.