19 terms

Experimental Design Vocabulary

STUDY
PLAY
independent variable
what is being tested by the scientist; the difference between groups; the "cause" of a change
dependent variable
the "effect" caused by the independent variable; what is observed and measured
controlled variable
factors that are not allowed to change; controlled by the scientist; allow for a fair test
manipulated variable
another name for the INDEPENDENT VARIABLE
responding variable
another name for the DEPENDENT VARIABLE
constant
another name for CONTROLLED VARIABLES
variables
factors that can change during an experimental investigation
experimental investigation
an investigation that involves the manipulation and control of variables
descriptive investigation
investigations based on observations
hypothesis
an educated guess about the relationship between the independent and dependent variable
observe
to carefully explore all of the properties or characteristics of an object or phenomenon
inference
deductions based on observations; interpretations of observations
fair test
an investigation in which you change only one factor (variable) and keep all other conditions the same
qualitative observations
hard to measure, count, or describe using numbers; describes the characteristics (or qualities) of something
quantitative observations
can be expressed in numbers; can be counted or measured
data
observations and measurements made during scientific investigations
bar graph
show comparisons of data with discreet categories
line graph
for continuous data; shows changes; shows relationships between two variables or sets of data
prediction
an educated guess