The Conversation on MSN11d
Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure
The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...
C&EN9mon
Lesson 1.1 - Classifying Objects Based on their Observable Properties
Help students realize that one way the objects can be sorted is by color, according to which ones are red, blue, or green. Explain that color is a “property” of an object. Explain that the objects can ...