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2026 Statistics
Key Facts: PAU General Sciences (Andalusia) Exam
90 min
Exam Duration
Distrito Único Andaluz
0–10
Grading Scale
Junta de Andalucía
4.0 / 10
Min. Access Phase Mark
PAU Regulations
60 / 40
GPA / PAU Weighting
Spanish University Access Regulations
The Andalusia PAU General Sciences exam (Ciencias Generales) is administered by Distrito Único Andaluz for 2nd Bachillerato students entering Spanish universities. Lasting 90 minutes per session, it evaluates competence across scientific methodology, energy and sustainability, materials, global health, and biotechnology. Local questions in this bank serve as an English-language MCQ study adaptation for the Andalusia PAU 2026 General Sciences exam.
Sample PAU General Sciences (Andalusia) Practice Questions
Try these sample questions to test your PAU General Sciences (Andalusia) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1What is the initial step of the scientific method when investigating a natural phenomenon?
A.Formulating a mathematical law
B.Making systematic observations and posing a testable question
C.Drawing final conclusions from unverified data
D.Publishing results in a peer-reviewed journal
Explanation: The scientific method begins with careful observation of a natural phenomenon, which leads to asking a clear, testable question. Hypotheses, experiments, and conclusions follow this initial observation step.
2In a controlled scientific experiment, what is the independent variable?
A.The factor that is intentionally manipulated by the researcher
B.The variable that is measured as the outcome of the experiment
C.The set of conditions kept strictly constant across all trials
D.The experimental error caused by instrument malfunction
Explanation: The independent variable is the single factor purposefully changed or manipulated by the experimenter to test its effect. The dependent variable is measured to observe the outcome caused by altering the independent variable.
3Why is keeping controlled variables constant essential during a scientific experiment?
A.It ensures that any observed change in the dependent variable is caused solely by the independent variable
B.It allows researchers to test multiple independent variables simultaneously
C.It guarantees that the hypothesis will be proven correct
D.It eliminates the need for a control group
Explanation: Controlled variables ensure internal validity by isolating the independent variable as the only factor causing changes in the dependent variable. If extraneous variables fluctuate, researchers cannot determine the true cause of the results.
4Which statement best distinguishes a scientific hypothesis from a scientific theory?
A.A hypothesis is a tentative, testable explanation, whereas a theory is a broad, well-substantiated explanation supported by extensive evidence
B.A hypothesis is an proven fact, while a theory is an unverified guess
C.A hypothesis applies only to physics, while a theory applies only to biology
D.A theory becomes a scientific law once it is accepted by all scientists
Explanation: A hypothesis is a specific, testable proposal put forward before testing. A scientific theory is a comprehensive, evidence-supported framework that explains a wide range of natural phenomena.
5Which of the following is an example of qualitative data?
A.The change in leaf color from green to reddish-brown during autumn
B.A temperature reading of 23.5 degrees Celsius
C.A plant growth measurement of 14.2 centimeters
D.A sample population count of 350 bacterial colonies
Explanation: Qualitative data describes non-numerical qualities, characteristics, or categories, such as color changes or texture descriptions. Quantitative data consists of numerical measurements.
6What primary role does the peer-review process serve in scientific publication?
A.Independent experts evaluate research methodology, validity, and conclusions before publication
B.It secures patent rights for the authors prior to public disclosure
C.It guarantees that the published research will never be disproven in the future
D.It funds the financial costs of future research projects
Explanation: Peer review acts as a quality-control mechanism where independent experts in the field scrutinize experimental design, data integrity, statistical analysis, and logical conclusions to maintain scientific standards.
7How do systematic errors differ fundamentally from random errors in scientific measurements?
A.Systematic errors consistently shift results in one direction, whereas random errors cause unpredictable fluctuations around the true value
B.Systematic errors can be eliminated by averaging multiple trials, whereas random errors cannot
C.Systematic errors only occur in biology, while random errors occur only in physics
D.Systematic errors are caused by environmental noise, while random errors stem from uncalibrated instruments
Explanation: Systematic errors stem from flawed equipment calibration or design flaws, causing consistent bias in one direction. Random errors arise from uncontrollable fluctuations, affecting precision symmetrically around the mean value.
8In a double-blind clinical trial evaluating a new medication, which condition is maintained?
A.Neither the participants nor the administering researchers know who receives the active drug or placebo
B.Participants are unaware of their assignment, but clinicians know which group receives the active treatment
C.Both groups receive different dosages of the active drug, and no placebo is used
D.The experimental data is kept hidden from regulatory review boards
Explanation: Double-blind designs prevent both participant placebo effects and observer bias from researchers evaluating clinical outcomes, ensuring objective data collection.
9A researcher notes a strong positive correlation between ice cream sales and sunburn incidents. What scientific principle explains why ice cream does not cause sunburn?
A.Correlation between two variables does not prove a direct causal relationship, as a confounding variable (hot weather) drives both
B.Positive correlations indicate an inverse causal relationship between variables
C.Observational correlation is only valid if sample sizes exceed one million data points
D.Sunburn is a biological outcome, making physical measurement principles non-applicable
Explanation: A correlation shows that two variables move together, but it does not imply cause. Here, ambient temperature and solar radiation (confounding variables) drive both increased ice cream consumption and outdoor sun exposure.
10What effect does increasing the sample size have on a statistical survey or experiment?
A.It reduces margin of error and increases statistical power to detect true effects
B.It eliminates systematic bias caused by uncalibrated instruments
C.It guarantees a statistically significant p-value regardless of the true effect
D.It removes the need to use random sampling techniques
Explanation: Larger sample sizes reduce random sampling variation, yielding narrower confidence intervals, smaller standard errors, and greater statistical power to detect true differences between groups.
About the PAU General Sciences (Andalusia) Practice Questions
Verified exam format metadata for Andalusia PAU General Sciences / Ciencias Generales Exam is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.