Movements of Ocean Water Important Questions
These Movements of Ocean Water Important Questions cover important NCERT concepts related to ocean waves, tides, tsunami, ocean currents and oceanic circulation.
The chapter-wise questions include MCQs, one-word questions, assertion and reason questions and analytical descriptive questions useful for UPSC, SSC, Railways, State PSC, CUET, CBSE board exams and competitive examinations.
NCERT Page Coverage: Page 114–117
Table of Contents
Multiple Choice Questions (MCQs)
These MCQs from Movements of Ocean Water help students revise important oceanic movement concepts related to waves, tides, tsunami and ocean currents.
MCQ 1
The horizontal movement of ocean water is known as:
- A. Tide
- B. Wave
- C. Ocean current
- D. Tsunami
Page Reference: Page 114
MCQ 2
Ocean waves are mainly generated by:
- A. Earthquakes only
- B. Winds
- C. Salinity only
- D. Ocean trenches only
Page Reference: Page 114
MCQ 3
The highest part of a wave is called:
- A. Trough
- B. Crest
- C. Swash
- D. Undertow
Page Reference: Page 114
MCQ 4
The lowest part of a wave is called:
- A. Crest
- B. Trough
- C. Surf
- D. Current
Page Reference: Page 114
MCQ 5
The movement of water particles in waves is mainly:
- A. Horizontal only
- B. Circular
- C. Vertical only
- D. Stationary
Page Reference: Page 114
MCQ 6
Tsunamis are mainly caused by:
- A. Strong winds
- B. Underwater earthquakes
- C. Heavy rainfall
- D. Tides only
Page Reference: Page 115
MCQ 7
Tsunami waves travel fastest in:
- A. Shallow water
- B. Deep oceans
- C. Rivers only
- D. Coastal lagoons only
Page Reference: Page 115
MCQ 8
The periodic rise and fall of ocean water is called:
- A. Ocean current
- B. Tide
- C. Wave drift
- D. Upwelling
Page Reference: Page 116
MCQ 9
Tides are mainly caused by:
- A. Winds only
- B. Gravitational pull of Moon and Sun
- C. Earthquakes only
- D. Ocean currents only
Page Reference: Page 116
MCQ 10
The highest tides are called:
- A. Neap tides
- B. Spring tides
- C. Drift tides
- D. Slack tides
Page Reference: Page 116
MCQ 11
Spring tides occur during:
- A. Half moon phase
- B. New moon and full moon
- C. Quarter moon only
- D. Winter season only
Page Reference: Page 116
MCQ 12
Neap tides occur when:
- A. Sun, Moon and Earth are aligned
- B. Moon and Sun pull at right angles
- C. Earth stops rotating
- D. Cyclones develop only
Page Reference: Page 116
MCQ 13
The force mainly responsible for tides is:
- A. Coriolis force
- B. Frictional force
- C. Gravitational force
- D. Magnetic force
Page Reference: Page 116
MCQ 14
Ocean currents are influenced by:
- A. Winds
- B. Temperature differences
- C. Salinity differences
- D. All of these
Page Reference: Page 117
MCQ 15
Warm ocean currents generally move from:
- A. Poles to equator
- B. Equator to poles
- C. East to west only
- D. West to east only
Page Reference: Page 117
MCQ 16
Cold currents generally originate from:
- A. Equatorial regions
- B. Polar regions
- C. Desert regions only
- D. Tropical islands only
Page Reference: Page 117
MCQ 17
The Gulf Stream is a:
- A. Cold current
- B. Warm current
- C. Polar current
- D. Tidal current only
Page Reference: Page 117
MCQ 18
The Labrador Current is a:
- A. Warm current
- B. Cold current
- C. Equatorial current
- D. Seasonal current only
Page Reference: Page 117
MCQ 19
Warm ocean currents generally cause:
- A. Cooling of coastal regions
- B. Increase in coastal temperature and humidity
- C. Reduction of rainfall completely
- D. Desert formation only
Page Reference: Page 117
MCQ 20
Cold ocean currents generally lead to:
- A. Warm humid climate
- B. Lower coastal temperatures
- C. Cyclones only
- D. Heavy convectional rainfall only
Page Reference: Page 117
One-Word / Very Short Answer Questions
| Question | Answer | Page Reference |
|---|---|---|
| What is the highest part of a wave called? | Crest | Page 114 |
| What is the lowest part of a wave called? | Trough | Page 114 |
| What mainly generates ocean waves? | Winds | Page 114 |
| What are giant sea waves caused by underwater earthquakes called? | Tsunami | Page 115 |
| What causes tides? | Gravitational pull of Moon and Sun | Page 116 |
| Which tides are highest? | Spring tides | Page 116 |
| Which tides occur during quarter moon phases? | Neap tides | Page 116 |
| What is horizontal movement of ocean water called? | Ocean current | Page 117 |
| Which warm current flows in Atlantic Ocean? | Gulf Stream | Page 117 |
| Which cold current flows near eastern Canada? | Labrador Current | Page 117 |
| Which warm current flows near Japan? | Kuroshio Current | Page 117 |
| What are circular ocean current systems called? | Gyres | Page 117 |
| Which region experiences strongest wave erosion? | Coastlines | Page 114 |
| What is distance between two wave crests called? | Wave length | Page 114 |
| What is vertical distance between crest and trough called? | Wave height | Page 114 |
| Which tides occur during full moon? | Spring tides | Page 116 |
| Which bay is famous for high tides? | Bay of Fundy | Page 116 |
| Which currents generally move from equator toward poles? | Warm currents | Page 117 |
| Which currents generally originate in polar regions? | Cold currents | Page 117 |
| Which oceanic movement regulates climate? | Ocean currents | Page 117 |
Assertion and Reason Questions
Question 1
Assertion (A): Ocean waves are mainly generated by winds.
Reason (R): Friction between wind and water transfers energy to ocean surface.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 114
Question 2
Assertion (A): Water particles in waves move in circular paths.
Reason (R): Energy moves forward while water particles mainly oscillate in place.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 114
Question 3
Assertion (A): Tsunamis become highly destructive near coasts.
Reason (R): Wave height increases as tsunami enters shallow water.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 115
Question 4
Assertion (A): Tides are caused by gravitational pull of Moon and Sun.
Reason (R): Ocean water responds to gravitational attraction of celestial bodies.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 116
Question 5
Assertion (A): Spring tides are higher than neap tides.
Reason (R): Gravitational pull of Sun and Moon acts together during spring tides.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 116
Question 6
Assertion (A): Neap tides occur during quarter moon phases.
Reason (R): Sun and Moon pull at right angles during neap tides.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 116
Question 7
Assertion (A): Warm ocean currents influence nearby coasts positively.
Reason (R): Warm currents increase coastal temperature and humidity.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 117
Question 8
Assertion (A): Cold ocean currents lower temperatures of nearby coastal regions.
Reason (R): Cold currents originate in high latitude regions.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 117
Question 9
Assertion (A): Ocean currents help regulate climate.
Reason (R): Ocean currents redistribute heat across Earth.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 117
Question 10
Assertion (A): Fishing grounds are often found where warm and cold currents meet.
Reason (R): Nutrient-rich waters support abundant marine life in such regions.
Options:
- A. Both A and R are true and R is the correct explanation
- B. Both A and R are true but R is not the correct explanation
- C. A is true but R is false
- D. A is false but R is true
Page Reference: Page 117
Important Exam-Based Concept Questions
Question 1
Explain the formation and characteristics of ocean waves.
Page Reference: Page 114
Question 2
Describe the major parts of a wave.
Page Reference: Page 114
Question 3
Explain how water particles move in ocean waves.
Page Reference: Page 114
Question 4
Discuss the causes and effects of tsunamis.
Page Reference: Page 115
Question 5
Explain why tsunamis become destructive near coastlines.
Page Reference: Page 115
Question 6
Describe the causes and characteristics of tides.
Page Reference: Page 116
Question 7
Differentiate between spring tides and neap tides.
Page Reference: Page 116
Question 8
Explain the influence of Moon and Sun on tides.
Page Reference: Page 116
Question 9
Discuss the causes of ocean currents.
Page Reference: Page 117
Question 10
Differentiate between warm and cold ocean currents.
Page Reference: Page 117
Question 11
Explain the climatic influence of ocean currents.
Page Reference: Page 117
Question 12
Discuss the importance of ocean currents in marine fisheries.
Page Reference: Page 117
Question 13
Explain the role of Coriolis force in oceanic circulation.
Page Reference: Page 117
Question 14
Describe the characteristics of Gulf Stream and Labrador Current.
Page Reference: Page 117
Question 15
Explain the concept of gyres in ocean circulation.
Page Reference: Page 117
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