Tidal Forces — MCQs August 20, 2025 by u930973931_answers 50 Score: 0 Attempted: 0/50 Subscribe 1. What primarily causes tidal forces on Earth? (A) Sun’s gravity (B) Moon’s gravity (C) Earth’s rotation (D) Wind forces 2. Tidal forces arise due to differences in: (A) Temperature (B) Gravitational pull (C) Atmospheric pressure (D) Magnetic fields 3. The point on Earth closest to the Moon experiences: (A) High tide (B) Low tide (C) No tide (D) Tidal null point 4. The far side of Earth from the Moon also experiences: (A) High tide (B) Low tide (C) No tide (D) Constant water level 5. How many high tides occur on Earth in a day? (A) One (B) Two (C) Three (D) Four 6. How many low tides occur on Earth in a day? (A) One (B) Two (C) Three (D) Four 7. Tides are strongest when: (A) Earth, Moon, and Sun are aligned (B) Earth and Moon are at right angles (C) Only the Sun pulls (D) Only the Moon pulls 8. The strongest tides are called: (A) Neap tides (B) Spring tides (C) Weak tides (D) Lunar tides 9. Neap tides occur when: (A) Earth, Moon, and Sun are aligned (B) Moon is at right angles to the Sun and Earth (C) Earth is at perihelion (D) Only Sun influences tides 10. Tidal locking occurs when: (A) A body rotates faster than it revolves (B) A body shows the same face to its partner (C) Orbits become elliptical (D) Tides disappear 11. Which celestial body is tidally locked to Earth? (A) Sun (B) Moon (C) Mars (D) Venus 12. Tidal friction causes Earth’s rotation to: (A) Speed up (B) Slow down (C) Stay constant (D) Reverse 13. The gradual outward drift of the Moon is due to: (A) Solar pressure (B) Tidal forces (C) Radiation pressure (D) Magnetic fields 14. Which ocean experiences the highest tidal ranges? (A) Pacific Ocean (B) Atlantic Ocean (C) Indian Ocean (D) Arctic Ocean 15. The Bay of Fundy is famous for: (A) No tides (B) Highest tidal ranges (C) Weak tidal activity (D) Constant water level 16. The Roche limit is associated with: (A) Orbital speed (B) Tidal disruption (C) Solar winds (D) Gravitational waves 17. A moon inside its planet’s Roche limit may: (A) Stay stable (B) Break apart (C) Expand (D) Become tidally locked 18. Saturn’s rings are believed to have formed due to: (A) Magnetic fields (B) Roche limit tidal forces (C) Solar radiation (D) Collisions only 19. Tidal heating is most evident on: (A) Earth’s Moon (B) Io, a moon of Jupiter (C) Titan (D) Ganymede 20. Tidal heating occurs due to: (A) Solar radiation (B) Variable gravitational forces (C) Atmospheric drag (D) Nuclear reactions 21. Tides on Earth are influenced by both: (A) Jupiter and Saturn (B) Sun and Moon (C) Earth’s core and mantle (D) Venus and Mars 22. Which contributes more to Earth’s tides? (A) Sun (B) Moon (C) Both equally (D) Neither 23. The interval between successive high tides is about: (A) 6 hours (B) 12 hours 25 minutes (C) 24 hours (D) 48 hours 24. Tidal bulges are caused by: (A) Centrifugal force and gravity (B) Wind currents (C) Earth’s magnetic field (D) Earthquakes 25. The Earth’s day lengthens over time because of: (A) Volcanism (B) Tidal friction (C) Plate tectonics (D) Solar activity 26. Which type of tide occurs when the tidal range is smallest? (A) Spring tide (B) Neap tide (C) Lunar tide (D) Solar tide 27. Tidal energy can be harnessed for: (A) Geothermal heating (B) Hydroelectric power (C) Electricity generation (D) Magnetic fields 28. The gravitational force decreases with: (A) Mass (B) Distance squared (C) Velocity (D) Pressure 29. Which body has stronger tidal effects on Earth’s oceans? (A) Moon (B) Sun (C) Jupiter (D) Saturn 30. A synchronous orbit results from: (A) Solar pressure (B) Tidal locking (C) Gravitational waves (D) Centripetal force 31. Tidal bulges remain aligned with: (A) Earth’s axis (B) Moon’s position (C) Sun’s magnetic field (D) Earth’s orbit 32. Tidal forces stretch an object: (A) Radially (B) Laterally (C) Compress it equally (D) Randomly 33. The concept of spaghettification is due to: (A) Black hole tidal forces (B) Strong magnetic fields (C) Solar radiation (D) Neutron star winds 34. Which law is fundamental in explaining tidal forces? (A) Newton’s law of gravitation (B) Coulomb’s law (C) Ohm’s law (D) Bernoulli’s law 35. The Sun’s tidal effect on Earth is about: (A) Half that of the Moon (B) Twice that of the Moon (C) Equal to the Moon (D) Ten times that of the Moon 36. Tidal forces are a type of: (A) Magnetic force (B) Differential gravitational force (C) Nuclear force (D) Elastic force 37. Ocean tides are delayed due to: (A) Inertia and friction (B) Wind (C) Earthquakes (D) Sunspots 38. Which tides occur during full moon? (A) Neap tides (B) Spring tides (C) Weak tides (D) Half tides 39. Which tides occur during quarter moons? (A) Spring tides (B) Neap tides (C) Lunar tides (D) High tides only 40. Which of the following is an application of tidal forces in astronomy? (A) Explaining galaxy collisions (B) Predicting solar flares (C) Measuring exoplanet atmospheres (D) Estimating star temperatures 41. Tidal disruption events occur when: (A) A star is torn apart by a black hole (B) A planet collides with another planet (C) Moons collide (D) Magnetic fields collapse 42. Which planet shows strong tidal heating effects on its moons? (A) Mars (B) Jupiter (C) Venus (D) Mercury 43. Tidal acceleration causes: (A) Earth to spin faster (B) Moon to recede from Earth (C) Moon to fall toward Earth (D) Earth’s orbit to shrink 44. The deformation of Earth’s solid body due to tides is called: (A) Ocean tides (B) Earth tides (C) Lunar pull (D) Solar bulge 45. Which factor increases tidal range? (A) Coastline shape (B) Earthquakes (C) Temperature (D) Wind only 46. The time difference between successive high and low tides is approximately: (A) 1 hour (B) 6 hours 12 minutes (C) 12 hours (D) 24 hours 47. The main restoring force for tides in oceans is: (A) Friction (B) Gravity (C) Pressure (D) Centrifugal force 48. Tidal resonance occurs when: (A) Ocean basins match tidal periods (B) Earth’s orbit changes (C) Sun’s activity peaks (D) Earth’s axis tilts 49. Which moon experiences a subsurface ocean due to tidal heating? (A) Io (B) Europa (C) Titan (D) Ganymede 50. The study of tidal forces is important in: (A) Geology and astronomy (B) Medicine and biology (C) Chemistry and physics only (D) Literature and history