뒤로sep 11
02:09
이 집합의 용어 (13)
what is science
"scientia" = knowledge
whats data
Data: The evidence on which scientific inquiry is based
Qualitative data: Recorded descriptions, often subjective
Quantitative data: Numerical measurements
Organized in tables and graphs and analyzed using statistics
how does science correct itself?
Science follows the evidence and corrects itself when new evidence is found
sceintific mehtods steps
observation: notice something
question: ask why
hypothesis: proposed explanation for a set of observation.
prediction: what can be done to test the hypothesis. "if...then"
Experiment Scientific test carried out under controlled conditions
Conclusions:Was the hypothesis supported or rejected
whats scientific theory
much broader in scope than a hypothesis/ a theory thats supported by a large body of evidence/ theory thats close to being true as much as possible.
whats experimental variable and the 2 types
Variables: The factors that vary in an experiment
Independent variable: The factor that is manipulated by the scientist
Dependant variable: The factor that is affected by the independent variable
controlled experiment
The experimental group is compared with a control group
experimental group
The group an experiment is being performed on
control group
The group that is not being experimented on. The experimental group is compared to the control group
clinical trials
Tests done on humans
Placebo: A treatment that does not contain the medication being tested
Double-blind trial: Neither the subjects nor the scientists know who is in which group
whats experimental study
Scientists manipulate factors to see how the subject changes or reacts
Observational Study
Scientists observe the subject without manipulating any factors
Comparison of fossils and living organisms
Observations of physical similarities
Diet and habitat
DNA sequencing
Exploration and discovery
Making observations, asking questions, formulating hypotheses