Who was the politician who introduced the term “iron curtain”?

Iron making developed in china almost a thousand years later than in the middle east. true false

One of galileo’s contributions to science was a creating the coordinate plane system. b developing the scientific method. c improving the telescope. d inventing the astrolabe.

The permo-triassic extinction event had a greater impact on the number of earth's species than did the extinction event at the end of the cretaceous true false