How can we help?

You can also find more resources in our Help Center.

ACT Science Challenge words

STUDY
PLAY
absolute
existing independent of any other cause
accuracy
freedom from mistake; exactness; the relationship between the graduation on a measuring device and the actual standard for the quantity being measured
adverse
acting against or in an opposite direction
analogous
similar or comparable in certain respects
analyze
to study the relationship of the parts of something by analysis
application
ability to put to a practical use; having something to do with the matter at hand
approximately
nearly; an estimate or figure that is almost exact
argument
a reason for or against something
assumption
something accepted as true
comprehend
to understand fully
concentration
the ratio of the amount of solute to the amount of solvent or solution
conclusion
a position or opinion or judgment reached after consideration
confirm
state or prove the truth of; substantiate; verify
consequence
a phenomenon that follows and is caused by some previous phenomenon
consistent
Steady; regular
Constant
persistent in occurrence and unvarying in nature
contradiction
opposition between two conflicting forces or ideas
control group
in an experiment, a group that serves as a standard of comparison with another group to which the control group is identical except for one factor
controlled experiment
an experiment that tests only one factor at a time by using a comparison of a control group with an experimental group
correlation
a measure of the extent to which two factors vary together, and thus of how well either factor predicts the other
criticism
disapproval expressed by pointing out faults or shortcomings
definitive
clearly defined or formulated
demonstrate
(v.) to clearly explain, show or prove with examples, models, or experiments; to gather in public to support an opinion or cause
dependence
a state of being controlled by something else
dependent variable
The outcome factor; the variable that may change in response to manipulations of the independent variable.
diminish
decrease in size, extent, or range
direct relationship
a relationship between two factors in which the factors move in the same direction
effective
producing or capable of producing an intended result or having a striking effect
estimation
an approximate calculation of quantity or degree or worth
ethical
(adj.) Having to do with morals, values, right and wrong; in accordance with standards of right conduct; requiring a prescription for purchase
evaluation
an appraisal of the value of something
evidence
collected body of data from observations and experiments
examine
consider in detail and subject to an analysis in order to discover essential features or meaning
expectation
An anticipated result or performance
experiment
the act of conducting a controlled test or investigation
experimental design
the manner in which a scientist intends to conduct an experiment
experimental group
in an experiment, the group that is exposed to the treatment, that is, to one version of the independent variable.
explanation
a statement that makes something comprehensible by describing the relevant structure or operation or circumstances etc.
extrapolation
an inference about the future (or about some hypothetical situation) based on known facts and observations
figure
a diagram or picture illustrating textual material
fundamental
being or involving basic facts or principles
generalization
a conclusion that is used to make a broad statement about a topic or person
hypothesis
possible explanation for a set of observations or possible answer to a scientific question
illustrate
clarify by giving an example of
imply
express or state indirectly
inconsistent
not in agreement
incorporate
include or contain
independent variable
the experimental factor that is manipulated; the variable whose effect is being studied
indication
something that serves to signify; a sign
indicator
any device that measures, records, or visibly points out; any of various substances used to point out, such as, a cause, treatment, or outcome on an action
ingredient
a component of a mixture or compound
interpolation
(mathematics) calculation of the value of a function between the values already known
inverse (indirect) relationship
the connection between two variables that shows the opposite effect (i.e., when the value of one variable increases, the value of the other variable decreases)
investigate
to look into closely; to study in great detail
irregular
deviating from what is usual or common or to be expected
issue
an important question that is in dispute and must be settled
judgement
the capacity to assess situations or circumstances shrewdly and to draw sound conclusions
justify
defend, explain, clear away, or make excuses for by reasoning
legend
A list that identifies patterns, symbols, or colors used in a chart.
maximum
the greatest possible degree
measurement
a quantitative description that includes both a number and a unit
mechanism
the technical aspects of doing something
minimum
the smallest possible quantity
model
the act of representing something (usually on a smaller scale)
modify
to change
observation
use of one or more of the senses—sight, hearing, touch, smell, and sometimes taste—to gather information
opinion
a belief based on experience and on seeing certain facts
optimum
most favorable condition or greatest degree or amount possible under given circumstances
pattern
a model, guide, or plan used in making things; definite direction, tendency, or characteristics
perform
get (something) done
phenomenon
a fact or event which can be observed and/or documented
precision
a measure of how close a series of measurements are to one another
predict
to say what will happen before it occurs
preference
a strong liking for one thing over another
probability
a measure of how likely it is that some event will occur
procedure
a particular course of action intended to achieve a result
proponent
one who argues in support of something
proportional
properly related in size or degree or other measurable characteristics
reasonable
marked by sound judgment
refute
prove to be false or incorrect
relationship
how one thing is connected to another
replicate
to duplicate, copy, or repeat
revise
to go over carefully in order to correct or improve
simulation
the act of imitating the behavior of some situation or some process by means of something suitably analogous (especially for the purpose of study or personnel training)
study
applying the mind to learning and understanding a subject (especially by reading)
suggest
make a proposal, declare a plan for something
summarize
give the main point or idea
support
establish or strengthen as with new evidence or facts
theory
a well-substantiated explanation of some aspect of the natural world
translate
change from one form or medium into another
treatment
a specific experimental condition applied to the units
underlying
The main, primary, or basic cause of a thing
unit
a single undivided whole
validity
the ability of a test to measure what it is intended to measure
value
a numerical quantity measured or assigned or computed
variable
liable to or capable of change
viewpoint
a mental position from which things are viewed
controlled variable
factor in an experiment that a scientist purposely keeps the same
interpretation
an explanation of something that is not immediately obvious