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PIMSO 2025 - Science - Secondary 4 - National Round Question 29

PIMSO Science · PIMSO 2025 - Science - Secondary 4 - National Round

Question 29

Which among the following can be observed in the visible universe but appears to contradict the claim that dark matter exists?

A. Gravitational lensing
B. Formation of galaxy clusters and superclusters
C. Gravitational force (which is a hundred times stronger than expected) that binds stars into galaxies
D. Accelerating rate of expansion of the universe

Editorial review: assess the printed choices and explain any scientific inconsistency. State any assumptions used.