19 terms

Biology Chapter 1 Vocabulary

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science
An organized way of gathering and analyzing evidence about the natural world.
observation
The act of noticing and describing events or processes in a careful, orderly way.
inference
A logical interpretation based on what scientists already know.
hypothesis
A scientific explanation for a set of observations that can be tested in ways that support or reject it.
controlled experiment
An experiment where only one variable is changed and all others are kept unchanged or controlled.
independent variable
The variable that is deliberately changed.
dependent variable
The variable that is observed and that changes in response to the independent variable.
control group
Exposed to the same conditions as the experimental group except for one variable.
data
Detailed records of experimental observations.
theory
A well tested explanation that unifies a broad range of observations and hypotheses.
bias
A particular preference or point of view that is personal, rather than scientific.
biology
The study of life.
DNA
A genetic code written in a molecule that stores the complex information of an organism.
stimulus
A signal to which an organism responds.
sexual reproduction
When cells from two parents unite to form the first cell of a new organism.
asexual reproduction
When a single organism produces offspring identical to itself.
homeostasis
Relatively constant internal physical and chemical conditions that organisms maintain.
metabolism
The combination of chemical reactions in which an organism builds up or breaks down materials.
biosphere
The thing in which all forms of life on Earth are connected to.