Ch 1

• a body of learning about the natural world.
• a collection of unified insights about the nature
• supported by facts
• stated as theories

• System of answring questions
• observation
• question
• hypothesis
• experimentation
• analysis/conclusion

• is a general set of principles (predpolozhenii)
• supported by evidence, that explains some aspects of nature

• are possible explanations of observations
• several can be proposed
• must be testable
• Must be falcifiable (open to negation through inquiry/testing)

• observation
• formulation and testing of hypotheses
• repeated experimentation
• results must be reproducible

and adjustable condition in an experiment

the variable that is changed or manipulated

all variables should be held constant "controlled" except for the experimental variable

study of life

• assimilate/use energy
• respond to their environment
• constant internal environment (homeostatis)
• reproduction
• composed of one or more cells
• highly orgonized

Maintenance of a stable, internal environment

atom - molecule - organelle - cell - tissue - organ - organ system - organism (human, lion) - population - community - ecosystem - biosphere (earth)

gradual change in populations over time