You are made of polymers, and so are trees and telephones and …
You are made of polymers, and so are trees and telephones and toys. A polymer is a long chain of identical molecules (or monomers) with a range of useful properties, like toughness or stretchiness -- and it turns out, we just can't live without them. Polymers occur both naturally -- our DNA is a polymer -- and synthetically, like plastic, Silly Putty and styrofoam. Jan Mattingly explains how polymers have changed our world.
ÒHow is Power Divided in the United States GovernmentÓ TED Talks provides …
ÒHow is Power Divided in the United States GovernmentÓ TED Talks provides a quick review lesson with a video, a couple of comprehension questions and an open ended discussion question about the first 3 articles of the Constitution.
WARNING: this video is NOT particularly rigorous, but it might be used best as a warm up review for seniors, or perhaps in a flipped classroom, a reminder for students who will be coming in the next day for a deeper discussion or for absent students to catch them up, or ELL students, or struggling students.
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