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Extremadura PAU General Sciences Examination — UEx (Ciencias Generales 2º Bachillerato 2026) practice questions are available now; exam metadata is being verified.
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2026 Statistics
Key Facts: Extremadura PAU General Sciences Exam
90 Minutes
Official examination duration
UEx PAU Regulations
Min 4.0
Minimum Access Phase score required
UEx PAU Guidelines
5 Blocks
Methodology, Energy, Health, Materials, and Earth/Cosmology
2º Bachillerato General Sciences Syllabus
EUR 78.26
Ordinary registration fee for PAU
UEx Fees
100
Practice questions available in this question bank
OpenExamPrep
Extremadura PAU General Sciences (UEx 2026) is a 90-minute university entrance exam assessing 2º Bachillerato General Sciences across 5 core interdisciplinary blocks.
Sample Extremadura PAU General Sciences Practice Questions
Try these sample questions to test your Extremadura PAU General Sciences exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1In a controlled scientific experiment designed to test the effect of temperature on enzymatic activity, what term describes the variable that the investigator systematically changes?
A.Independent variable
B.Dependent variable
C.Controlled variable
D.Confounding variable
Explanation: The independent variable is the factor intentionally manipulated or altered by the researcher (e.g., temperature) to observe its effect on the response variable.
2Which of the following SI derived units is used to measure energy, work, and quantity of heat?
A.Watt (W)
B.Joule (J)
C.Pascal (Pa)
D.Newton (N)
Explanation: The Joule (J) is the SI unit of energy, work, and heat, defined as 1 J = 1 N·m = 1 kg·m²/s².
3When plotting data where the dependent variable increases at a rate proportional to its current value, what type of mathematical relationship does the resulting curve demonstrate?
A.Linear growth
B.Inverse proportion
C.Exponential growth
D.Logarithmic decay
Explanation: Exponential growth occurs when the growth rate of a mathematical function is proportional to the function's current value, yielding a characteristic J-shaped curve.
4Why is a placebo group included in clinical trials testing new pharmacological treatments?
A.To increase the sample size without incurring chemical reagent costs
B.To ensure all trial participants receive active therapeutic compounds
C.To eliminate the need for statistical significance testing
D.To isolate the physiological effect of the drug from psychological factors and baseline changes
Explanation: Placebos control for psychological expectations, participant reporting bias, and spontaneous recovery, isolating the specific pharmacological efficacy of the drug.
5What is the primary difference between accuracy and precision in physical scientific measurements?
A.Accuracy reflects proximity to the true value, whereas precision reflects repeatability of measurements
B.Accuracy measures consistency across trials, whereas precision measures closeness to target
C.Accuracy applies only to qualitative data, whereas precision applies to quantitative data
D.Accuracy is affected by random errors, whereas precision is affected only by systematic bias
Explanation: Accuracy describes how close a measured value is to the true or accepted value, while precision describes the agreement among repeated measurements under unchanged conditions.
6Which characteristic is a key hallmark of pseudoscience compared to rigorous empirical science?
A.Reliance on peer-reviewed double-blind experimental studies
B.Use of non-falsifiable hypotheses and reliance on anecdotal claims
C.Systematic revision of concepts when new empirical evidence emerges
D.Clear quantitative reporting of experimental uncertainty and error margins
Explanation: Pseudoscientific claims frequently rely on non-falsifiable premises (claims that cannot be proven wrong by any observable evidence) and personal anecdotes rather than controlled empirical trials.
7A student measures the mass of a chemical sample five times, obtaining 4.12 g, 4.11 g, 4.13 g, 4.12 g, and 4.12 g. The true reference mass is 4.50 g. How should these experimental results be characterized?
A.High accuracy and high precision
B.High accuracy and low precision
C.Low accuracy and high precision
D.Low accuracy and low precision
Explanation: The measured values are highly clustered together (range of 0.02 g, high precision), but they systematically deviate from the true value of 4.50 g (low accuracy), indicating systematic error.
8In a double-blind study evaluating a new vaccine, which party is kept unaware of group assignments (vaccine vs. placebo)?
A.Only the participants receiving the injections
B.Only the healthcare staff administering the injections
C.Only the bio-statistical analysis team evaluating data
D.Both the study participants and the clinical staff conducting the trial
Explanation: In a double-blind trial, neither the participants nor the clinical experimenters know who receives the active treatment, preventing subconscious bias in treatment or evaluation.
9According to Karl Popper's criterion of falsifiability, when is a scientific hypothesis considered valid for empirical testing?
A.When it makes specific predictions that can, in principle, be proven false by observation
B.When it can be logically proven true under all possible cosmic conditions
C.When it is endorsed by a unanimous consensus of academic experts
D.When it uses mathematical equations that contain no numerical variables
Explanation: Falsifiability requires that a hypothesis generates testable predictions capable of being negated by empirical observation or experiment.
10A scatter plot displaying the relationship between atmospheric carbon dioxide concentration and global average surface temperature shows a correlation coefficient of r = +0.94. What does this statistical value indicate?
A.A weak positive linear relationship proving direct single-factor causation
B.A strong positive linear correlation between the two measured variables
C.An inverse proportional relationship where CO2 lowers temperature
D.That 94% of temperature variation is caused by measurement error
Explanation: A correlation coefficient r near +1 (+0.94) indicates a strong positive linear association between the two variables, though correlation alone does not automatically prove direct causation.
About the Extremadura PAU General Sciences Practice Questions
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