1-20 Flashcards
Hypothesis
The proposed scientific explanation for a set of observations.
Theory
Ideas that have been supported over time.
Dependent Variable
Observed factor that may change in response to the other variable.
Independent Variable
The factor that is purposely changed in an experiment.
Control Group
A group of subjects, closely resembling the experimental group but not receiving the factor under study, which serves as a comparison to the experimental group.
Experimental Group
A group of subjects which receive the factor under study.
Cell
The smallest unit of an organism considered to be alive.
Stimulus
Any physical or chemical input that is sensed.
Homeostasis
The process by which organisms keep their internal body conditions fairly constant to survive.
Evolution
A change in a kind of organism over time.
Atom
The basic unit of matter
Proton
The positively charged particle found in the nucleus of an atom.
Neutron
The particle with no charge found in the nucleus of an atom.
Electron
The negatively charged particle found in the nucleus of an atom.
Element
A pure substance that consists entirely of one type of atom.
