AP European History — Unit 4: Scientific, Philosophical, and Political Developments (c.1648–1815)
Practice questions, answers, and key terms for Unit 4, aligned to the College Board CED.
Exam weighting: Unit 4 is 10% of the AP European History exam.
What AP European History Unit 4 covers
The College Board Course and Exam Description breaks Unit 4 into 6 topics:
- 4.1 Contextualizing Scientific and Intellectual Revolutions
- 4.2 The Scientific Revolution
- 4.3 The Enlightenment
- 4.4 18th-Century Society and Demographics
- 4.5 18th-Century Culture and Arts
- 4.6 Causation: Scientific Revolution and Enlightenment
AP European History Unit 4 practice questions
Copernicus and Galileo reached different audiences than Aristotle ever could, even though their ideas were just as radical. What earlier invention let new science spread fast enough to challenge old authority?
The printing press — it let scientific findings circulate rapidly and widely. New observations could be shared, debated, and verified across Europe.
Before 1500, where did 'truth about nature' come from — and what one shift made the Scientific Revolution possible?
Truth came from ancient authority (Aristotle, Ptolemy, Galen) and the Church. The shift was trusting direct observation and math over inherited authority.
Copernicus moves the Sun to the center of the cosmos. Why does that quietly threaten the Catholic Church?
The geocentric model matched the Bible's cosmology of an unmoving Earth. Dethroning Earth undercut a worldview the Church had long endorsed.
Copernicus published heliocentrism decades earlier, but Galileo got dragged before the Inquisition. What did Galileo add that made it dangerous?
Galileo added telescope proof and promoted it openly in Italian. He turned a math hypothesis into a popular, defendable claim.
Copernicus, Kepler, and Galileo each left a piece unfinished. Who tied it into one law that explained both falling apples and orbiting planets?
Isaac Newton — his Principia (1687) gave universal gravitation. One law governed motion on Earth and in the heavens.
Bacon and Descartes both wanted to rebuild knowledge — but they pointed opposite directions. What's the split?
Bacon championed empiricism/induction; Descartes, rationalism/deduction. Bacon is bottom-up from data; Descartes top-down from logic.
A 17th-century doctor refuses to dissect a body because Galen already wrote down how anatomy works. What method is replacing that mindset?
The scientific method — knowledge from observation and experiment. Vesalius's dissections replaced trust in ancient authority.
Your friend says the Scientific Revolution meant Europeans suddenly stopped believing in God. Where are they wrong?
Most figures — Newton, Descartes, Pascal, Bacon — stayed religious. The shift was in HOW they justified knowledge (skepticism and evidence), not in abandoning faith.
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Key terms in Unit 4
These 12 terms show up in the Unit 4 cards. Each one links to its definition in the AP European History key-term reference.
Drill all of Unit 4 with spaced repetition
Free Unit 1 on every AP course. Smart spaced repetition. No subscription.