Biologia prepa primer semestre

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  • Publicado : 21 de noviembre de 2011
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Ciencia: definición de ciencia, método científico, identificación de problemas científicos en situaciones reales
Science: is way of gathering and analyzing evidence about the natural worldScientific Methodology: It involves observing and asking questions, making inferences and forming hypotheses, conducting controlled experiments, collecting and analyzing data, and drawing conclusions

*Observation and asking questions: Scientific investigations begin with observation, the act of noticing and describing events or processes in a careful, orderly way. A good scientist can “think insomething that nobody has thought yet, while looking at something that everybody sees” (Arthur Schopenhauer) that kind of observation leads to questions that no one has asked before
* Inferring andforming a Hypothesis: An Inference is a logical interpretation based on what scientists already know. This combined with imagination can lead to a hypothesis: Is a scientific explanation for a set ofobservations that can be tested in ways that support or reject it.
* Designing controlled experiments: Is an experiment where one variable is changed and all other variables should be keptunchanged or controlled.
*the variable that is deliberately changed is called de Independent Variable (or Manipulated variable)
*The variable that is observed and that changes in response to theindependent variable is called dependent variable (or responding variable)
*A control group is exposed to the same conditions as the experimental group except for one independent variable.
* Collectingand analyzing data: Scientists make detailed records of experimental observations, gathering information called data. There are main types of data:
Quantitative data: are numbers obtained by countingor measuring
Qualitative data: are descriptive and involve characteristics that cannot usually be counted

Vida: definición de vida, características de los seres vivos, teoría celular con sus tres...
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