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PHYSICAL
SCIENCES – MATTER
LESSON 1. Historical Perspective
Materials:
worksheet
Objective: Students learn the evolution
of atomic theory.
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Teacher Notes:
In
Physical Science - Math Skills, Chapter IV (Symmetry of
Matter), we discussed the early concepts of the forms of
matter. In Physical
Science - Matter, Chapter I (Periodic Table) we looked at
how we understand the atom in 2008.
This
lesson looks more at the atomic theory and how it evolved
historically. Some of
the people that contributed to the Periodic Table, also
started to think about the structure of the atom. The Greek
Leucippus and Democritus in the 400’s BC thought about tiny
particles, but the technology to understand the atom would
not be present until over 2000 years later when machines
like linear accelerators where invented to look at how
subatomic particles react.
As new equipment is used the concept can be refined
or even changed.
Students should read the material and then complete the
worksheet, which reviews the material.
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ANSWERS
1. A. Fourth;
B. First; C. Third; D. Second
2. A; 3. C 4. B
5. B 6. D; 7.
E
8. B; 9. A;
10 D
11. Since
scientists could not see or experiment on atoms, they had to deduce what
made it work or use mathematically
models; it is hard to discover something you
have not idea is there
12. Yes, new data
from accelerators could find new components, especially if they
build more powerful collisions
13. Leptons (tau,
muon, electron, tau neutrino, muon neutrino, electron neutrino)
Quarks (bottom, strange, down, top, charm, up)
14. Particle accelerators
15. The Standard Model |