Transcript Wednesday, September 3

DAILY QUESTION
September 3, 2008
1. What instruments were used in Italy in the
1600s to study weather? (Hint: Use your book
to help you!)
AGENDA
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9/3/08
Daily Question
Correct Sect. 2 Directed Reading Wksht
Sect. 2 Notetaking Worksheet
Assignments:
9/4
1. Foldable with terms due 9/4
2. Sect. 2 Reinforcement pg. 26 Wksht due
3. Study for Test on Friday
Scientific Theory
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Is an explanation or model backed by
results obtained from many tests or
experiments
A hypothesis can become a theory if
over a long period of time the
hypothesis is supported by many
experiments
Dr. Whipple’s “Dirty Snowball”
Before 1949, people thought comets were
swirling clouds of dust.
In 1949, Dr. Whipple hypothesized that the
nucleus of a comet contains practically all of a
comet’s mass and consists of ice and dust.
When it close to the Sun, the ice vaporizes
and releases dust and gas that becomes the
comet’s tail.
It wasn’t until Halley’s comet was studied in
1986 that gave enough support of Dr.
Whipple’s hypothesis that it finally became a
theory.
Scientific Law
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Is a rule that describes the behavior of
something in nature
Sir Isaac Newton
Sir Isaac Newton wrote the laws of motion in his
work titled Philosophiae Naturalis Principia
Mathematica that was published in 1687.
He used his laws of motion to explain many results
concerning the motion of physical objects.
Limits of Science
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Science can not answer all the
questions and problems in the universe.
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For a questions or problem to be
scientifically studied, there must be
variables that can be observed, measured,
and tested.
Ethics
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Deals with moral values about what is
good or bad.
Ethical Questions
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“Do humans have more value on Earth
than other life-forms?”
“Should animals be used in medical
experiments?”
Bias
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Your personal opinion
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Can affect the outcome of your experiment
if you do not design your experiment to be
objective
What are some other jobs, besides
scientists, that the person should
remain objective?
Fraud
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The opposite of ethical behavior
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Making up data
Changing results
Taking credit for other scientists’ work
Chapter 1 Vocabulary
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Bias
Constant
Control
Dependent variable
Earth science
Ethics
Hypothesis
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Independent variable
Science
Scientific law
Scientific method
Scientific theory
Technology
Variable