Chapter 2, page 27; Table 2-1
"THE SCIENTIFIC METHOD"
1. Make careful observations.
2. Recognize and state problem.
3. Develop a hypothesis.
4. Make prediction to be tested.
5. Perform experiments (or make observations)
to test prediction.
6. Results may support or refute the hypothesis;
They can be used to generate
other hypotheses and may contribute to development of a theory.
Pages 28-29:
HYPOTHESIS:
1. is a proposed explanation
2. "A hypothesis is a tentative explanation."
3. "A good hypothesis exhibits the following:
1) It is reasonably consistent with all well-established facts.
2) It is capable of being tested;
that is, it should generate definite predictions, whether the results are
positive
or negative. Test results should also be repeatable
by independent observers.
3) It is falsifiable, which means it
can be proved false.
4. A hypothesis cannot really be proved true,
but in theory (though not necessarily in practice) a well-stated hypothesis
can
be proved false. If
one believes in an unfalsifiable hypothesis (e.g., the existence of invisible
and undetectable angels),
it must be on grounds other
than scientific ones.
5. A hypothesis is not true just because some
of its predictions (the ones we happen to have thought of or have thus
far
been able to test) have
come true. After all, they could be true by coincidence. In
particular, failure to observe a
prediction does not make
a hypothesis false, but it does not show that the hypothesis is true, either.
Page 32:
THEORY:
1. A hypothesis supported by a large body
of observations and experiments becomes a
theory.
2. A good theory relates facts that previously
appeared to be unrelated and that could not be explained on common ground.
3. A good theory grows as additioinal facts
become known. ...
SCIENTIFIC PRINCIPLE:
A theory that, over a long period of time, has yielded true predictions
and is thus almost
universally accepted ...
LAW: This
term is sometimes used for a principle judjed to be of great basic importance
as is, for instance, the law of
gravity or the law of biogenesis.