1. color code vocabulary words and definitions
write it down!
important ideas and concepts
write it down
review and supplementary information
you should know most of this, I wouldn’t write down a lot
FYI – all presentations (notes) reviewed in class will be available on the school website by the weekend.

2. how science happens… scientists… investigate experiment observe test
A scientist may perform experiments to find a new aspect of the natural world, to explain a known phenomenon, to check the results of other experiments, or to test the predictions of current theories.
observe
test

3. how do we organize science?
Science has many branches

4. branches of science (cont)
natural science is divided into life science, physical science and earth science

5. but… what is science? science
the knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested
pure science is the continuing search for scientific knowledge
practical science is what we call technology
the application of science for practical purposes

6. scientific laws & theories
a descriptive statement or equation that reliably predicts events under certain conditions
theory
a system of ideas that explains many related observations and is supported by a large body of evidence acquired through scientific investigation
laws tell you what happened
theories tell you why it happened

7. scientific laws & theories (cont)
experimental results should support laws and theories
if they don’t, the law or theory may need to be modified
for this reason scientific theories are always being questioned and examined
to be valid, a theory must:
explain observations
be repeatable
be predictable

8. scientific laws & theories (cont)
laws and theories can be stated in two ways
qualitative statement
describes something with words
quantitative statement
describes something with mathematical equations
For example: Newton’s Second Law
A body of mass m subject to a force undergoes an acceleration that has the same direction as the force and a magnitude that is directly proportional to the force and inversely proportional to the mass.
F = ma, force = mass x acceleration

9. using models in science…
a representation of an object or event that can be studied to understand the real object or event
scientists use models to study objects and events that are…
too big
too small
examples:
conceptual model of the atom (WAYYY too tiny to study)
computer models of the universe (WAYYY too big to study)