Assignment 2: Ch1
Truth: Early Beliefs
Read pages 4-6 to find out about early scientific thought. Mark and X in the
correct columns beside each term.
Led to
Life
God
Used by
Frogs
Liverwort
4 Bodily
bloodletting
from
left
Hippocrates
formed
to treat
fluids
non-
clues
in 350 BC
from
liver
must be
life
in
puddles
condition
in balance
nature
Doctrine of
Humors
Doctrine of
Signatures
Spontaneous
Generation
Spontaneous Generation and the Scientific Method
Using information found in the facet on pages 17-19 as well as information about
Needham’s experiment on pg 6, analyze or identify the steps of the scientific
method in each of the following men’s work and answer the questions.
Define:
Spontaneous generation (abiogenesis)-
BiogenesisJan Baptista van Helmont (1600’s)- Recipe for Mice
1. Summarize his experiment-
2. What were some problems with van Helmont’s experiment?
1
Francesco Redi (1668)
1. Question:
2. Hypothesis:
3. Controls and variables of 1st experiment (identify control group, independent and
dependent variables)
4. Controls and Variables of 2nd experiment (same as above)
5. Conclusion:
John Needham (pg 6 and facet)
1. Summarize his experiment:
2. What were some problems with his experimentation?
2
Lazzaro Spallanzani (1700’s)
1. Question:
2. Controls and variables of 1st experiment (identify control group,
independent and dependent variables) Identify any problems.
3. Question of 2nd experiment?
4. Controls and variables of 2nd set of experiments (identify control group,
independent and dependent variables) Identify any problems.
Louis Pasteur (1864)
1. Hypothesis of first set of experiments: (use IF-THEN
statement)
2. Identify controls and variables:
3. Conclusion:
4. Summaraize his second, swan-necked flask experiment. How did this support
his first experiment?
3