Alchemy Unit Investigation III: A Particulate World

60 Pages·2012·0.37 MB·English

by  Key Curriculum Press

Alchemy Unit
Investigation III:
A Particulate World
Lesson 1: Pudding and Clouds
Lesson 2: Building Atoms
Lesson 3: Subatomic Heavyweights
Lesson 4: Life on the Edge
Alchemy Unit – Investigation III
Lesson 1:
Pudding and Clouds
ChemCatalyst
In the 5th century BCE a Greek
philosopher named Leucippus and his
student, Democritis, stated, “All matter is
made up of particles that can be divided
called atoms.”
•
What do you think atoms are?
© 2004 Key Curriculum Press.
Unit 1 • Investigation III
The Big Question
•
How have chemists thought about the
atom through history?
© 2004 Key Curriculum Press.
Unit 1 • Investigation III
You will be able to:
•
Describe some models of an atom and
explain how they differ.
© 2004 Key Curriculum Press.
Unit 1 • Investigation III
Notes
•
Atoms are extremely small particles,
which cannot be seen, even with
microscopes.
•
All matter is made up of atoms.
•
Scientists have created models to
describe atoms. Models are similar to
theories, but often include a picture or
physical representation.
(cont.)
© 2004 Key Curriculum Press.
Unit 1 • Investigation III
(cont.)
•
When a model is supported by
scientific evidence it is often
accepted by the scientific community.
•
Scientific evidence is a collection of
observations that many people have
made. Everyone agrees on the same
collection of observations.
•
As new evidence is gathered, models
are refined and changed.
© 2004 Key Curriculum Press.
Unit 1 • Investigation III
Activity
Purpose: This lesson will introduce you
to various models for the atom that have
appeared over the past two hundred
years. The descriptions of five models of
the atom are on a separate handout.
(cont.)
© 2004 Key Curriculum Press.
Unit 1 • Investigation III
(cont.)
Five Models of the Atom
© 2004 Key Curriculum Press.
Unit 1 • Investigation III
Making Sense
•
Examine the date of the atomic
evidence and then put the five models
in the correct order of their introduction
to the world of science.
© 2004 Key Curriculum Press.
Unit 1 • Investigation III