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ACT Science: Key Concepts
Master the essential skills for ACT Science with this flashcard deck. It focuses on interpreting data, understanding experimental design, and evaluating scientific arguments, which are crucial for success. Sharpen your analytical abilities and boost your score on test day.
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What is an independent variable in an experiment?
The independent variable is the factor that is intentionally changed or manipulated by the experimenter. It is the presumed cause being investigated.
What is a dependent variable in an experiment?
The dependent variable is the factor that is measured or observed as a response to changes in the independent variable. It is the effect being studied.
What is the purpose of a control group in an experiment?
A control group is used as a baseline for comparison, receiving no treatment or a standard treatment to isolate the effect of the independent variable.
What is a scientific hypothesis?
A hypothesis is a testable, proposed explanation for an observation, often stated as an 'if...then' statement. It must be falsifiable.
What is extrapolation in data interpretation?
Extrapolation is the process of predicting values beyond the range of the measured data points, often by extending a trend line on a graph.
What is interpolation in data interpretation?
Interpolation is the process of estimating values within the range of measured data points, based on existing trends shown in a graph or table.
How is a direct relationship typically shown on a graph?
In a direct relationship, as one variable increases, the other variable also increases, usually represented by an upward-sloping line or curve.
How is an inverse relationship typically shown on a graph?
In an inverse relationship, as one variable increases, the other variable decreases, usually represented by a downward-sloping line or curve.
What are anomalous data points, and how should they be treated?
Anomalous data points deviate significantly from the general trend. They should be noted and investigated for potential errors or unusual occurrences, not simply discarded.
What is the key to successfully answering 'Conflicting Viewpoints' passages on the ACT Science test?
Identify the main claim or hypothesis of each viewpoint and the evidence or reasoning presented to support it, focusing on points of agreement and disagreement.
What is the difference between a positive control and a negative control in an experiment?
A positive control is expected to produce a known result, while a negative control is expected to produce no result or a baseline result, both helping validate the experimental setup.
Why is it important to pay attention to units when interpreting scientific data?
Units provide crucial context and scale for numerical values, ensuring correct interpretation, allowing for proper comparisons, and preventing miscalculations.
Distinguish between precision and accuracy in scientific measurements.
Precision refers to how close repeated measurements are to each other (reproducibility), while accuracy refers to how close a measurement is to the true or accepted value.
What does a consistent or uniform data trend in an experiment suggest?
A consistent or uniform data trend suggests a reliable relationship between the variables being studied, indicating a predictable pattern or law.
When evaluating experimental results, what factors contribute to the overall validity of the experiment?
Factors include proper control of variables, adequate sample size, unbiased data collection, repeatability of procedures, and whether the experiment truly measured what it intended to measure.