The Science of Biology. Biology 392. Observing the World. If you are a thinker, you question things you observe and may not understand and you try to find an answer. There are many ways to find these answers. If you are a scientific thinker you find your answer using the scientific method.
If you are a thinker, you question things you observe and may not understand and you try to find an answer. There are many ways to find these answers. If you are a scientific thinker you find your answer using the scientific method.
Why is the sky blue?
scientists have accumulated over time.
Biology is a specific field of science that studies life
Observing- process of gathering information using your senses in a careful, orderly way
Inferencing- making a logical interpretation based on prior knowledge or experience
*Many questions you have now or will have in the future involve science. You must understand science to make intelligent decisions about such issues.
group, constants and variables
What have I observed?
What do I want to know?
Has anyone asked this before?
Did they discover an answer?
How did they go about looking for an answer?
What other things do I need to understand to answer my question?
Based on the research you have done, write a possible answer or solution – your best educated guess – to your question.
What was expected? What was unexpected?
What trends did you notice in the data?
Indicate whether or not the data supports the hypothesis and explain why or why not.
Suggest possible improvements to the experiment.
Suggest further avenues of research or uses for the information discovered.
1st Experiment- 1668, Francesco Redi:
OBSERVATIONS: Flies land on meat that is left uncovered. Later, maggots appear on the meat.
HYPOTHESIS: Flies produce maggots.
jars, type of meat,
gauze covering that
keeps flies away from
No maggots appear
CONCLUSION: Maggots form only when flies come in contact with meat. Spontaneous generation of maggots did not occur.Redi’s Experiment
2nd Experiment- Mid 1700s, John Needham:
under the right conditions.
3rd Experiment- Lazzaro Spallanzani:
Gravy is teeming
Gravy is free of
Gravy is boiled.Spallanzani’s Tests
Needham tried first but didn’t bring gravy to hot enough temperature.
4th Experiment- 1864, Louis Pasteur:
can only come from living things.
and is now considered a theory