The science of biology

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The Science of Biology
Unit 1

What is science?
* Science is an organized way of gathering and analyzing evidence about the natural world.
* The word science derives from the Latin wordscientia, which means “knowledge”.
* Science also refers to the body of knowledge that scientific studies have gathered over the years.
The Goals Of Science
* The scientific way of knowingincludes the view that the physical universe is a system composed of parts and processes that interact.
* One goal of science is to provide natural explanations for events in the natural world.* Science also aims to use those explanations to understand patterns in nature and to make useful predictions about natural events.
Scientific Methodology: The heart of science
* Scientificmethodology involves observing and asking questions, making inferences and forming hypothesis, conducting controlled experiments, collecting and analyzing data, and drawing conclusions.
* Proceduresof scientific methodology:
1) Observing and asking questions.
Observation: the act of noticing and describing events or processes in a careful, orderly way.
2) Inferring and Forming aHypothesis.
Inference: is a logical interpretation based on what scientists already know.
Hypothesis: is a scientific explanation for a set of observations that can be tested in ways that support orreject it.
3) Designing Controlled Experiments.
Controlled experiment: an experiment in which only one variable is changed.
A control group is exposed to the same conditions as the experimentalgroup, except for the independent variable.
Independent variable: the variable that is deliberately changed.
Dependent variable: the variable that is observed ad that changes
in response to theindependent variable.
4) Collecting and analyzing data.
Data: detailed records of experimental observations, gathering information.
Quantitative data: numbers obtained by counting or measuring....
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