Aim : How has atomic theory evolved in the last 2000 years? Do Now: 1. Vocabulary : Discrete- separate and distinct Indivisible-undividable Atom-unit of.

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Aim : How has atomic theory evolved in the last 2000 years? Do Now: 1. Vocabulary : Discrete- separate and distinct Indivisible-undividable Atom-unit of matter 2. What is matter composed of? Essential Questions: Explain the statement: “Matter is continuous.” Describe Democritus’ view of the unit of matter. How did Dalton describe atoms?

Aim : How has our understanding of atomic structure evolved in the last 2000 years? How did Aristotle think of science? Why are his writings largely qualitative, not quantitative? Describe his view of the cosmos (universe and our place in it.) State and describe his five “elements” How do atomists explain the world as opposed to Aristotle? Describe Democritus’ and Leucippus’ view of what matter is composed of. How did Dalton describe atoms?

Aim : How has our understanding of atomic structure evolved in the last 2000 years? Essential Questions: Explain the statement: “Matter is continuous.” Describe Democritus’ view of the unit of matter. How did Dalton describe atoms? How was Dalton’s work different from that of the ancient Greek philosophers? “Each atom of an element is identical to every other atom of that element. Elements are composed of atoms which are identical in mass.” True or false? Explain.